Finding the Third Proportional to 249,693.75 and 353,308.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,693.75 : 353,308.50 = 353,308.50 : x
2. Step 2: Convert to fraction form
   249,693.75/353,308.50 = 353,308.50/x
3. Step 3: Cross multiply
   249,693.75x = 353,308.50 × 353,308.50
4. Step 4: Simplify right side
   249,693.75x = 124,826,896,172.25
5. Step 5: Solve for x
   x = 124,826,896,172.25/249,693.75
6. Step 6: Final answer
   x = 499,919.99