Finding the Fourth Proportional to 231,174.72, 319,005 and 130,553.28

Step by Step Solution

1. Step 1: Write the proportion equation
   231,174.72 : 319,005 = 130,553.28 : x
2. Step 2: Convert to fraction form
   231,174.72/319,005 = 130,553.28/x
3. Step 3: Cross multiply
   231,174.72x = 319,005 × 130,553.28
4. Step 4: Simplify right side
   231,174.72x = 41,647,149,086.40
5. Step 5: Solve for x
   x = 41,647,149,086.40/231,174.72
6. Step 6: Final answer
   x = 180,154.43