Finding the Fourth Proportional to 115,078.72, 158,898.72 and 89,999.68

Step by Step Solution

1. Step 1: Write the proportion equation
   115,078.72 : 158,898.72 = 89,999.68 : x
2. Step 2: Convert to fraction form
   115,078.72/158,898.72 = 89,999.68/x
3. Step 3: Cross multiply
   115,078.72x = 158,898.72 × 89,999.68
4. Step 4: Simplify right side
   115,078.72x = 14,300,833,952.41
5. Step 5: Solve for x
   x = 14,300,833,952.41/115,078.72
6. Step 6: Final answer
   x = 124,270.01