Finding the Third Proportional to 249,945 and 387,130.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,945 : 387,130.50 = 387,130.50 : x
2. Step 2: Convert to fraction form
   249,945/387,130.50 = 387,130.50/x
3. Step 3: Cross multiply
   249,945x = 387,130.50 × 387,130.50
4. Step 4: Simplify right side
   249,945x = 149,870,024,030.25
5. Step 5: Solve for x
   x = 149,870,024,030.25/249,945
6. Step 6: Final answer
   x = 599,612.01