Finding the Fourth Proportional to 161,610.53, 242,085.31 and 131,731.25

Step by Step Solution

1. Step 1: Write the proportion equation
   161,610.53 : 242,085.31 = 131,731.25 : x
2. Step 2: Convert to fraction form
   161,610.53/242,085.31 = 131,731.25/x
3. Step 3: Cross multiply
   161,610.53x = 242,085.31 × 131,731.25
4. Step 4: Simplify right side
   161,610.53x = 31,890,200,492.94
5. Step 5: Solve for x
   x = 31,890,200,492.94/161,610.53
6. Step 6: Final answer
   x = 197,327.49