Finding the Fourth Proportional to 156,042.78, 215,368.17 and 88,974.78

Step by Step Solution

1. Step 1: Write the proportion equation
   156,042.78 : 215,368.17 = 88,974.78 : x
2. Step 2: Convert to fraction form
   156,042.78/215,368.17 = 88,974.78/x
3. Step 3: Cross multiply
   156,042.78x = 215,368.17 × 88,974.78
4. Step 4: Simplify right side
   156,042.78x = 19,162,335,544.75
5. Step 5: Solve for x
   x = 19,162,335,544.75/156,042.78
6. Step 6: Final answer
   x = 122,801.81