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Finding the Third Proportional to 8,638,978 and 18,663,416

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Solution

The third proportional to 8,638,978 and 18,663,416 is: 40,319,942.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638,978 : 18,663,416 = 18,663,416 : x
  2. Step 2: Convert to fraction form
    8,638,978/18,663,416 = 18,663,416/x
  3. Step 3: Cross multiply
    8,638,978x = 18,663,416 × 18,663,416
  4. Step 4: Simplify right side
    8,638,978x = 348,323,096,789,056
  5. Step 5: Solve for x
    x = 348,323,096,789,056/8,638,978
  6. Step 6: Final answer
    x = 40,319,942.57

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