Finding the Third Proportional to 431,535 and 660,442.50

Step by Step Solution

1. Step 1: Write the proportion equation
   431,535 : 660,442.50 = 660,442.50 : x
2. Step 2: Convert to fraction form
   431,535/660,442.50 = 660,442.50/x
3. Step 3: Cross multiply
   431,535x = 660,442.50 × 660,442.50
4. Step 4: Simplify right side
   431,535x = 436,184,295,806.25
5. Step 5: Solve for x
   x = 436,184,295,806.25/431,535
6. Step 6: Final answer
   x = 1,010,773.86