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Finding the Fourth Proportional to 386,940.86, 580,410.52 and 102,659.91

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Solution

The fourth proportional to 386,940.86, 580,410.52 and 102,659.91 is: 153,989.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,940.86 : 580,410.52 = 102,659.91 : x
  2. Step 2: Convert to fraction form
    386,940.86/580,410.52 = 102,659.91/x
  3. Step 3: Cross multiply
    386,940.86x = 580,410.52 × 102,659.91
  4. Step 4: Simplify right side
    386,940.86x = 59,584,888,330.90
  5. Step 5: Solve for x
    x = 59,584,888,330.90/386,940.86
  6. Step 6: Final answer
    x = 153,989.65

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