Finding the Third Proportional to 8,536,974 and 13,120,389

Step by Step Solution

1. Step 1: Write the proportion equation
   8,536,974 : 13,120,389 = 13,120,389 : x
2. Step 2: Convert to fraction form
   8,536,974/13,120,389 = 13,120,389/x
3. Step 3: Cross multiply
   8,536,974x = 13,120,389 × 13,120,389
4. Step 4: Simplify right side
   8,536,974x = 172,144,607,511,321
5. Step 5: Solve for x
   x = 172,144,607,511,321/8,536,974
6. Step 6: Final answer
   x = 20,164,593.16