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Finding the Fourth Proportional to 491,978.14, 678,697.82 and 287,903.94

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Solution

The fourth proportional to 491,978.14, 678,697.82 and 287,903.94 is: 397,171.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,978.14 : 678,697.82 = 287,903.94 : x
  2. Step 2: Convert to fraction form
    491,978.14/678,697.82 = 287,903.94/x
  3. Step 3: Cross multiply
    491,978.14x = 678,697.82 × 287,903.94
  4. Step 4: Simplify right side
    491,978.14x = 195,399,773,542.41
  5. Step 5: Solve for x
    x = 195,399,773,542.41/491,978.14
  6. Step 6: Final answer
    x = 397,171.66

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