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Finding the Fourth Proportional to 91,817, 137,783.76 and 39,226.88

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Solution

The fourth proportional to 91,817, 137,783.76 and 39,226.88 is: 58,865.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,817 : 137,783.76 = 39,226.88 : x
  2. Step 2: Convert to fraction form
    91,817/137,783.76 = 39,226.88/x
  3. Step 3: Cross multiply
    91,817x = 137,783.76 × 39,226.88
  4. Step 4: Simplify right side
    91,817x = 5,404,827,019.47
  5. Step 5: Solve for x
    x = 5,404,827,019.47/91,817
  6. Step 6: Final answer
    x = 58,865.21

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