Finding the Fourth Proportional to 236,940.38, 355,472.89 and 85,152.79

Step by Step Solution

1. Step 1: Write the proportion equation
   236,940.38 : 355,472.89 = 85,152.79 : x
2. Step 2: Convert to fraction form
   236,940.38/355,472.89 = 85,152.79/x
3. Step 3: Cross multiply
   236,940.38x = 355,472.89 × 85,152.79
4. Step 4: Simplify right side
   236,940.38x = 30,269,508,352.86
5. Step 5: Solve for x
   x = 30,269,508,352.86/236,940.38
6. Step 6: Final answer
   x = 127,751.58