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Finding the Fourth Proportional to 612,420.88, 845,168.96 and 340,516.68

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Solution

The fourth proportional to 612,420.88, 845,168.96 and 340,516.68 is: 469,928.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,420.88 : 845,168.96 = 340,516.68 : x
  2. Step 2: Convert to fraction form
    612,420.88/845,168.96 = 340,516.68/x
  3. Step 3: Cross multiply
    612,420.88x = 845,168.96 × 340,516.68
  4. Step 4: Simplify right side
    612,420.88x = 287,794,128,298.25
  5. Step 5: Solve for x
    x = 287,794,128,298.25/612,420.88
  6. Step 6: Final answer
    x = 469,928.67

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