Finding the Third Proportional to 249,165 and 386,851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,165 : 386,851.50 = 386,851.50 : x
2. Step 2: Convert to fraction form
   249,165/386,851.50 = 386,851.50/x
3. Step 3: Cross multiply
   249,165x = 386,851.50 × 386,851.50
4. Step 4: Simplify right side
   249,165x = 149,654,083,052.25
5. Step 5: Solve for x
   x = 149,654,083,052.25/249,165
6. Step 6: Final answer
   x = 600,622.41