Finding the Third Proportional to 392,098.50 and 580,860

Step by Step Solution

1. Step 1: Write the proportion equation
   392,098.50 : 580,860 = 580,860 : x
2. Step 2: Convert to fraction form
   392,098.50/580,860 = 580,860/x
3. Step 3: Cross multiply
   392,098.50x = 580,860 × 580,860
4. Step 4: Simplify right side
   392,098.50x = 337,398,339,600
5. Step 5: Solve for x
   x = 337,398,339,600/392,098.50
6. Step 6: Final answer
   x = 860,493.83