Finding the Fourth Proportional to 91,158.78, 136,752.79 and 38,568.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91,158.78 : 136,752.79 = 38,568.72 : x
2. Step 2: Convert to fraction form
   91,158.78/136,752.79 = 38,568.72/x
3. Step 3: Cross multiply
   91,158.78x = 136,752.79 × 38,568.72
4. Step 4: Simplify right side
   91,158.78x = 5,274,380,066.73
5. Step 5: Solve for x
   x = 5,274,380,066.73/91,158.78
6. Step 6: Final answer
   x = 57,859.27