Finding the Third Proportional to 8,485,724 and 13,136,705

Step by Step Solution

1. Step 1: Write the proportion equation
   8,485,724 : 13,136,705 = 13,136,705 : x
2. Step 2: Convert to fraction form
   8,485,724/13,136,705 = 13,136,705/x
3. Step 3: Cross multiply
   8,485,724x = 13,136,705 × 13,136,705
4. Step 4: Simplify right side
   8,485,724x = 172,573,018,257,025
5. Step 5: Solve for x
   x = 172,573,018,257,025/8,485,724
6. Step 6: Final answer
   x = 20,336,864.39