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Finding the Fourth Proportional to 1,987,051.20, 2,978,904.96 and 864,274.56

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Solution

The fourth proportional to 1,987,051.20, 2,978,904.96 and 864,274.56 is: 1,295,684.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987,051.20 : 2,978,904.96 = 864,274.56 : x
  2. Step 2: Convert to fraction form
    1,987,051.20/2,978,904.96 = 864,274.56/x
  3. Step 3: Cross multiply
    1,987,051.20x = 2,978,904.96 × 864,274.56
  4. Step 4: Simplify right side
    1,987,051.20x = 2,574,591,773,585.82
  5. Step 5: Solve for x
    x = 2,574,591,773,585.82/1,987,051.20
  6. Step 6: Final answer
    x = 1,295,684.67

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