Finding the Fourth Proportional to 236,086.83, 325,790.31 and 128,654.55

Step by Step Solution

1. Step 1: Write the proportion equation
   236,086.83 : 325,790.31 = 128,654.55 : x
2. Step 2: Convert to fraction form
   236,086.83/325,790.31 = 128,654.55/x
3. Step 3: Cross multiply
   236,086.83x = 325,790.31 × 128,654.55
4. Step 4: Simplify right side
   236,086.83x = 41,914,405,727.41
5. Step 5: Solve for x
   x = 41,914,405,727.41/236,086.83
6. Step 6: Final answer
   x = 177,538.09