Finding the Third Proportional to 519,991.50 and 783,676

Step by Step Solution

1. Step 1: Write the proportion equation
   519,991.50 : 783,676 = 783,676 : x
2. Step 2: Convert to fraction form
   519,991.50/783,676 = 783,676/x
3. Step 3: Cross multiply
   519,991.50x = 783,676 × 783,676
4. Step 4: Simplify right side
   519,991.50x = 614,148,072,976
5. Step 5: Solve for x
   x = 614,148,072,976/519,991.50
6. Step 6: Final answer
   x = 1,181,073.29