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Finding the Fourth Proportional to 6,978.60, 9,638.98 and 5,218.02

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Solution

The fourth proportional to 6,978.60, 9,638.98 and 5,218.02 is: 7,207.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,978.60 : 9,638.98 = 5,218.02 : x
  2. Step 2: Convert to fraction form
    6,978.60/9,638.98 = 5,218.02/x
  3. Step 3: Cross multiply
    6,978.60x = 9,638.98 × 5,218.02
  4. Step 4: Simplify right side
    6,978.60x = 50,296,390.42
  5. Step 5: Solve for x
    x = 50,296,390.42/6,978.60
  6. Step 6: Final answer
    x = 7,207.23

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