Finding the Third Proportional to 372,144.38 and 815,209.31

Step by Step Solution

1. Step 1: Write the proportion equation
   372,144.38 : 815,209.31 = 815,209.31 : x
2. Step 2: Convert to fraction form
   372,144.38/815,209.31 = 815,209.31/x
3. Step 3: Cross multiply
   372,144.38x = 815,209.31 × 815,209.31
4. Step 4: Simplify right side
   372,144.38x = 664,566,223,186.72
5. Step 5: Solve for x
   x = 664,566,223,186.72/372,144.38
6. Step 6: Final answer
   x = 1,785,775.27