Finding the Third Proportional to 389,432.50 and 841,142.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,432.50 : 841,142.50 = 841,142.50 : x
2. Step 2: Convert to fraction form
   389,432.50/841,142.50 = 841,142.50/x
3. Step 3: Cross multiply
   389,432.50x = 841,142.50 × 841,142.50
4. Step 4: Simplify right side
   389,432.50x = 707,520,705,306.25
5. Step 5: Solve for x
   x = 707,520,705,306.25/389,432.50
6. Step 6: Final answer
   x = 1,816,799.33