Finding the Third Proportional to 428,406.50 and 930,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   428,406.50 : 930,561.50 = 930,561.50 : x
2. Step 2: Convert to fraction form
   428,406.50/930,561.50 = 930,561.50/x
3. Step 3: Cross multiply
   428,406.50x = 930,561.50 × 930,561.50
4. Step 4: Simplify right side
   428,406.50x = 865,944,705,282.25
5. Step 5: Solve for x
   x = 865,944,705,282.25/428,406.50
6. Step 6: Final answer
   x = 2,021,315.52