Finding the Fourth Proportional to 91,156.34, 136,717.20 and 38,602.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91,156.34 : 136,717.20 = 38,602.72 : x
2. Step 2: Convert to fraction form
   91,156.34/136,717.20 = 38,602.72/x
3. Step 3: Cross multiply
   91,156.34x = 136,717.20 × 38,602.72
4. Step 4: Simplify right side
   91,156.34x = 5,277,655,790.78
5. Step 5: Solve for x
   x = 5,277,655,790.78/91,156.34
6. Step 6: Final answer
   x = 57,896.75