Finding the Fourth Proportional to 89,397.72, 134,121.69 and 72,716.04

Step by Step Solution

1. Step 1: Write the proportion equation
   89,397.72 : 134,121.69 = 72,716.04 : x
2. Step 2: Convert to fraction form
   89,397.72/134,121.69 = 72,716.04/x
3. Step 3: Cross multiply
   89,397.72x = 134,121.69 × 72,716.04
4. Step 4: Simplify right side
   89,397.72x = 9,752,798,174.91
5. Step 5: Solve for x
   x = 9,752,798,174.91/89,397.72
6. Step 6: Final answer
   x = 109,094.48