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Finding the Fourth Proportional to 389,519.63, 584,485.16 and 276,398.40

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Solution

The fourth proportional to 389,519.63, 584,485.16 and 276,398.40 is: 414,743.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,519.63 : 584,485.16 = 276,398.40 : x
  2. Step 2: Convert to fraction form
    389,519.63/584,485.16 = 276,398.40/x
  3. Step 3: Cross multiply
    389,519.63x = 584,485.16 × 276,398.40
  4. Step 4: Simplify right side
    389,519.63x = 161,550,765,199.95
  5. Step 5: Solve for x
    x = 161,550,765,199.95/389,519.63
  6. Step 6: Final answer
    x = 414,743.58

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