Finding the Fourth Proportional to 236,945.69, 355,480.77 and 85,158.09

Step by Step Solution

1. Step 1: Write the proportion equation
   236,945.69 : 355,480.77 = 85,158.09 : x
2. Step 2: Convert to fraction form
   236,945.69/355,480.77 = 85,158.09/x
3. Step 3: Cross multiply
   236,945.69x = 355,480.77 × 85,158.09
4. Step 4: Simplify right side
   236,945.69x = 30,272,063,404.93
5. Step 5: Solve for x
   x = 30,272,063,404.93/236,945.69
6. Step 6: Final answer
   x = 127,759.50