Finding the Fourth Proportional to 72,081.36, 99,540.72 and 68,154.48

Step by Step Solution

1. Step 1: Write the proportion equation
   72,081.36 : 99,540.72 = 68,154.48 : x
2. Step 2: Convert to fraction form
   72,081.36/99,540.72 = 68,154.48/x
3. Step 3: Cross multiply
   72,081.36x = 99,540.72 × 68,154.48
4. Step 4: Simplify right side
   72,081.36x = 6,784,146,010.43
5. Step 5: Solve for x
   x = 6,784,146,010.43/72,081.36
6. Step 6: Final answer
   x = 94,117.90