Finding the Fourth Proportional to 105,078.89, 157,725.56 and 76,915.29

Step by Step Solution

1. Step 1: Write the proportion equation
   105,078.89 : 157,725.56 = 76,915.29 : x
2. Step 2: Convert to fraction form
   105,078.89/157,725.56 = 76,915.29/x
3. Step 3: Cross multiply
   105,078.89x = 157,725.56 × 76,915.29
4. Step 4: Simplify right side
   105,078.89x = 12,131,506,803.24
5. Step 5: Solve for x
   x = 12,131,506,803.24/105,078.89
6. Step 6: Final answer
   x = 115,451.42