Finding the Third Proportional to 561,025 and 789,121.50

Step by Step Solution

1. Step 1: Write the proportion equation
   561,025 : 789,121.50 = 789,121.50 : x
2. Step 2: Convert to fraction form
   561,025/789,121.50 = 789,121.50/x
3. Step 3: Cross multiply
   561,025x = 789,121.50 × 789,121.50
4. Step 4: Simplify right side
   561,025x = 622,712,741,762.25
5. Step 5: Solve for x
   x = 622,712,741,762.25/561,025
6. Step 6: Final answer
   x = 1,109,955.42