Finding the Third Proportional to 3,921,942 and 8,495,128

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921,942 : 8,495,128 = 8,495,128 : x
2. Step 2: Convert to fraction form
   3,921,942/8,495,128 = 8,495,128/x
3. Step 3: Cross multiply
   3,921,942x = 8,495,128 × 8,495,128
4. Step 4: Simplify right side
   3,921,942x = 72,167,199,736,384
5. Step 5: Solve for x
   x = 72,167,199,736,384/3,921,942
6. Step 6: Final answer
   x = 18,400,883.98