Finding the Fourth Proportional to 308,105.31, 425,187.32 and 172,144.11

Step by Step Solution

1. Step 1: Write the proportion equation
   308,105.31 : 425,187.32 = 172,144.11 : x
2. Step 2: Convert to fraction form
   308,105.31/425,187.32 = 172,144.11/x
3. Step 3: Cross multiply
   308,105.31x = 425,187.32 × 172,144.11
4. Step 4: Simplify right side
   308,105.31x = 73,193,491,923.96
5. Step 5: Solve for x
   x = 73,193,491,923.96/308,105.31
6. Step 6: Final answer
   x = 237,559.98