Finding the Third Proportional to 431,568 and 660,490.50

Step by Step Solution

1. Step 1: Write the proportion equation
   431,568 : 660,490.50 = 660,490.50 : x
2. Step 2: Convert to fraction form
   431,568/660,490.50 = 660,490.50/x
3. Step 3: Cross multiply
   431,568x = 660,490.50 × 660,490.50
4. Step 4: Simplify right side
   431,568x = 436,247,700,590.25
5. Step 5: Solve for x
   x = 436,247,700,590.25/431,568
6. Step 6: Final answer
   x = 1,010,843.48