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Finding the Fourth Proportional to 30,921.64, 42,666.96 and 18,185.74

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Solution

The fourth proportional to 30,921.64, 42,666.96 and 18,185.74 is: 25,093.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,921.64 : 42,666.96 = 18,185.74 : x
  2. Step 2: Convert to fraction form
    30,921.64/42,666.96 = 18,185.74/x
  3. Step 3: Cross multiply
    30,921.64x = 42,666.96 × 18,185.74
  4. Step 4: Simplify right side
    30,921.64x = 775,930,241.15
  5. Step 5: Solve for x
    x = 775,930,241.15/30,921.64
  6. Step 6: Final answer
    x = 25,093.44

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