Finding the Third Proportional to 392,557.50 and 856,539

Step by Step Solution

1. Step 1: Write the proportion equation
   392,557.50 : 856,539 = 856,539 : x
2. Step 2: Convert to fraction form
   392,557.50/856,539 = 856,539/x
3. Step 3: Cross multiply
   392,557.50x = 856,539 × 856,539
4. Step 4: Simplify right side
   392,557.50x = 733,659,058,521
5. Step 5: Solve for x
   x = 733,659,058,521/392,557.50
6. Step 6: Final answer
   x = 1,868,921.26