Finding the Fourth Proportional to 236,085.39, 325,797.30 and 128,655.15

Step by Step Solution

1. Step 1: Write the proportion equation
   236,085.39 : 325,797.30 = 128,655.15 : x
2. Step 2: Convert to fraction form
   236,085.39/325,797.30 = 128,655.15/x
3. Step 3: Cross multiply
   236,085.39x = 325,797.30 × 128,655.15
4. Step 4: Simplify right side
   236,085.39x = 41,915,500,501.10
5. Step 5: Solve for x
   x = 41,915,500,501.10/236,085.39
6. Step 6: Final answer
   x = 177,543.81