Finding the Third Proportional to 253,443.38 and 354,330

Step by Step Solution

1. Step 1: Write the proportion equation
   253,443.38 : 354,330 = 354,330 : x
2. Step 2: Convert to fraction form
   253,443.38/354,330 = 354,330/x
3. Step 3: Cross multiply
   253,443.38x = 354,330 × 354,330
4. Step 4: Simplify right side
   253,443.38x = 125,549,748,900
5. Step 5: Solve for x
   x = 125,549,748,900/253,443.38
6. Step 6: Final answer
   x = 495,375.94