Finding the Fourth Proportional to 99,976.42, 137,233.06 and 88,392.15

Step by Step Solution

1. Step 1: Write the proportion equation
   99,976.42 : 137,233.06 = 88,392.15 : x
2. Step 2: Convert to fraction form
   99,976.42/137,233.06 = 88,392.15/x
3. Step 3: Cross multiply
   99,976.42x = 137,233.06 × 88,392.15
4. Step 4: Simplify right side
   99,976.42x = 12,130,325,003.50
5. Step 5: Solve for x
   x = 12,130,325,003.50/99,976.42
6. Step 6: Final answer
   x = 121,331.86