Finding the Third Proportional to 3,976,501 and 8,661,566

Step by Step Solution

1. Step 1: Write the proportion equation
   3,976,501 : 8,661,566 = 8,661,566 : x
2. Step 2: Convert to fraction form
   3,976,501/8,661,566 = 8,661,566/x
3. Step 3: Cross multiply
   3,976,501x = 8,661,566 × 8,661,566
4. Step 4: Simplify right side
   3,976,501x = 75,022,725,572,356
5. Step 5: Solve for x
   x = 75,022,725,572,356/3,976,501
6. Step 6: Final answer
   x = 18,866,517.47