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Finding the Fourth Proportional to 8,611.72, 12,918.30 and 3,681.16

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Solution

The fourth proportional to 8,611.72, 12,918.30 and 3,681.16 is: 5,522.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.72 : 12,918.30 = 3,681.16 : x
  2. Step 2: Convert to fraction form
    8,611.72/12,918.30 = 3,681.16/x
  3. Step 3: Cross multiply
    8,611.72x = 12,918.30 × 3,681.16
  4. Step 4: Simplify right side
    8,611.72x = 47,554,329.23
  5. Step 5: Solve for x
    x = 47,554,329.23/8,611.72
  6. Step 6: Final answer
    x = 5,522.05

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