Finding the Third Proportional to 5,539,716 and 8,287,440

Step by Step Solution

1. Step 1: Write the proportion equation
   5,539,716 : 8,287,440 = 8,287,440 : x
2. Step 2: Convert to fraction form
   5,539,716/8,287,440 = 8,287,440/x
3. Step 3: Cross multiply
   5,539,716x = 8,287,440 × 8,287,440
4. Step 4: Simplify right side
   5,539,716x = 68,681,661,753,600
5. Step 5: Solve for x
   x = 68,681,661,753,600/5,539,716
6. Step 6: Final answer
   x = 12,398,047.44