Finding the Third Proportional to 535,309.50 and 726,660

Step by Step Solution

1. Step 1: Write the proportion equation
   535,309.50 : 726,660 = 726,660 : x
2. Step 2: Convert to fraction form
   535,309.50/726,660 = 726,660/x
3. Step 3: Cross multiply
   535,309.50x = 726,660 × 726,660
4. Step 4: Simplify right side
   535,309.50x = 528,034,755,600
5. Step 5: Solve for x
   x = 528,034,755,600/535,309.50
6. Step 6: Final answer
   x = 986,410.21