Finding the Third Proportional to 535,689 and 810,445.50

Step by Step Solution

1. Step 1: Write the proportion equation
   535,689 : 810,445.50 = 810,445.50 : x
2. Step 2: Convert to fraction form
   535,689/810,445.50 = 810,445.50/x
3. Step 3: Cross multiply
   535,689x = 810,445.50 × 810,445.50
4. Step 4: Simplify right side
   535,689x = 656,821,908,470.25
5. Step 5: Solve for x
   x = 656,821,908,470.25/535,689
6. Step 6: Final answer
   x = 1,226,125.44