Finding the Third Proportional to 249,942.38 and 387,126

Step by Step Solution

1. Step 1: Write the proportion equation
   249,942.38 : 387,126 = 387,126 : x
2. Step 2: Convert to fraction form
   249,942.38/387,126 = 387,126/x
3. Step 3: Cross multiply
   249,942.38x = 387,126 × 387,126
4. Step 4: Simplify right side
   249,942.38x = 149,866,539,876
5. Step 5: Solve for x
   x = 149,866,539,876/249,942.38
6. Step 6: Final answer
   x = 599,604.37