Finding the Third Proportional to 5,911,478 and 8,909,499

Step by Step Solution

1. Step 1: Write the proportion equation
   5,911,478 : 8,909,499 = 8,909,499 : x
2. Step 2: Convert to fraction form
   5,911,478/8,909,499 = 8,909,499/x
3. Step 3: Cross multiply
   5,911,478x = 8,909,499 × 8,909,499
4. Step 4: Simplify right side
   5,911,478x = 79,379,172,431,001
5. Step 5: Solve for x
   x = 79,379,172,431,001/5,911,478
6. Step 6: Final answer
   x = 13,427,973.92