Finding the Third Proportional to 9,777,816 and 21,053,448

Step by Step Solution

1. Step 1: Write the proportion equation
   9,777,816 : 21,053,448 = 21,053,448 : x
2. Step 2: Convert to fraction form
   9,777,816/21,053,448 = 21,053,448/x
3. Step 3: Cross multiply
   9,777,816x = 21,053,448 × 21,053,448
4. Step 4: Simplify right side
   9,777,816x = 443,247,672,688,704
5. Step 5: Solve for x
   x = 443,247,672,688,704/9,777,816
6. Step 6: Final answer
   x = 45,331,971.14