Finding the Third Proportional to 363,540 and 555,150

Step by Step Solution

1. Step 1: Write the proportion equation
   363,540 : 555,150 = 555,150 : x
2. Step 2: Convert to fraction form
   363,540/555,150 = 555,150/x
3. Step 3: Cross multiply
   363,540x = 555,150 × 555,150
4. Step 4: Simplify right side
   363,540x = 308,191,522,500
5. Step 5: Solve for x
   x = 308,191,522,500/363,540
6. Step 6: Final answer
   x = 847,751.34