Finding the Third Proportional to 249,060.25 and 389,142.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,060.25 : 389,142.50 = 389,142.50 : x
2. Step 2: Convert to fraction form
   249,060.25/389,142.50 = 389,142.50/x
3. Step 3: Cross multiply
   249,060.25x = 389,142.50 × 389,142.50
4. Step 4: Simplify right side
   249,060.25x = 151,431,885,306.25
5. Step 5: Solve for x
   x = 151,431,885,306.25/249,060.25
6. Step 6: Final answer
   x = 608,013.06