Finding the Fourth Proportional to 231,144, 318,978.72 and 125,160

Step by Step Solution

1. Step 1: Write the proportion equation
   231,144 : 318,978.72 = 125,160 : x
2. Step 2: Convert to fraction form
   231,144/318,978.72 = 125,160/x
3. Step 3: Cross multiply
   231,144x = 318,978.72 × 125,160
4. Step 4: Simplify right side
   231,144x = 39,923,376,595.20
5. Step 5: Solve for x
   x = 39,923,376,595.20/231,144
6. Step 6: Final answer
   x = 172,720.80