Finding the Third Proportional to 392,455 and 532,618.50

Step by Step Solution

1. Step 1: Write the proportion equation
   392,455 : 532,618.50 = 532,618.50 : x
2. Step 2: Convert to fraction form
   392,455/532,618.50 = 532,618.50/x
3. Step 3: Cross multiply
   392,455x = 532,618.50 × 532,618.50
4. Step 4: Simplify right side
   392,455x = 283,682,466,542.25
5. Step 5: Solve for x
   x = 283,682,466,542.25/392,455
6. Step 6: Final answer
   x = 722,840.75