Finding the Third Proportional to 8,639,470 and 18,561,061

Step by Step Solution

1. Step 1: Write the proportion equation
   8,639,470 : 18,561,061 = 18,561,061 : x
2. Step 2: Convert to fraction form
   8,639,470/18,561,061 = 18,561,061/x
3. Step 3: Cross multiply
   8,639,470x = 18,561,061 × 18,561,061
4. Step 4: Simplify right side
   8,639,470x = 344,512,985,445,721
5. Step 5: Solve for x
   x = 344,512,985,445,721/8,639,470
6. Step 6: Final answer
   x = 39,876,634.27