Finding the Third Proportional to 511,663.50 and 783,090

Step by Step Solution

1. Step 1: Write the proportion equation
   511,663.50 : 783,090 = 783,090 : x
2. Step 2: Convert to fraction form
   511,663.50/783,090 = 783,090/x
3. Step 3: Cross multiply
   511,663.50x = 783,090 × 783,090
4. Step 4: Simplify right side
   511,663.50x = 613,229,948,100
5. Step 5: Solve for x
   x = 613,229,948,100/511,663.50
6. Step 6: Final answer
   x = 1,198,502.43