Finding the Third Proportional to 359,275.50 and 499,540.50

Step by Step Solution

1. Step 1: Write the proportion equation
   359,275.50 : 499,540.50 = 499,540.50 : x
2. Step 2: Convert to fraction form
   359,275.50/499,540.50 = 499,540.50/x
3. Step 3: Cross multiply
   359,275.50x = 499,540.50 × 499,540.50
4. Step 4: Simplify right side
   359,275.50x = 249,540,711,140.25
5. Step 5: Solve for x
   x = 249,540,711,140.25/359,275.50
6. Step 6: Final answer
   x = 694,566.46