Finding the Third Proportional to 3,861,988 and 8,485,256

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861,988 : 8,485,256 = 8,485,256 : x
2. Step 2: Convert to fraction form
   3,861,988/8,485,256 = 8,485,256/x
3. Step 3: Cross multiply
   3,861,988x = 8,485,256 × 8,485,256
4. Step 4: Simplify right side
   3,861,988x = 71,999,569,385,536
5. Step 5: Solve for x
   x = 71,999,569,385,536/3,861,988
6. Step 6: Final answer
   x = 18,643,136.48