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Finding the Fourth Proportional to 478,103.72, 659,785.10 and 287,120.30

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Solution

The fourth proportional to 478,103.72, 659,785.10 and 287,120.30 is: 396,227.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,103.72 : 659,785.10 = 287,120.30 : x
  2. Step 2: Convert to fraction form
    478,103.72/659,785.10 = 287,120.30/x
  3. Step 3: Cross multiply
    478,103.72x = 659,785.10 × 287,120.30
  4. Step 4: Simplify right side
    478,103.72x = 189,437,691,113.00
  5. Step 5: Solve for x
    x = 189,437,691,113.00/478,103.72
  6. Step 6: Final answer
    x = 396,227.19

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