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Finding the Fourth Proportional to 8,978.92, 13,471.62 and 3,136.39

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Solution

The fourth proportional to 8,978.92, 13,471.62 and 3,136.39 is: 4,705.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978.92 : 13,471.62 = 3,136.39 : x
  2. Step 2: Convert to fraction form
    8,978.92/13,471.62 = 3,136.39/x
  3. Step 3: Cross multiply
    8,978.92x = 13,471.62 × 3,136.39
  4. Step 4: Simplify right side
    8,978.92x = 42,252,254.25
  5. Step 5: Solve for x
    x = 42,252,254.25/8,978.92
  6. Step 6: Final answer
    x = 4,705.72

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