Finding the Fourth Proportional to 89,231.73, 133,584.62 and 78,160.04

Step by Step Solution

1. Step 1: Write the proportion equation
   89,231.73 : 133,584.62 = 78,160.04 : x
2. Step 2: Convert to fraction form
   89,231.73/133,584.62 = 78,160.04/x
3. Step 3: Cross multiply
   89,231.73x = 133,584.62 × 78,160.04
4. Step 4: Simplify right side
   89,231.73x = 10,440,978,851.78
5. Step 5: Solve for x
   x = 10,440,978,851.78/89,231.73
6. Step 6: Final answer
   x = 117,009.72