Finding the Fourth Proportional to 236,111.58, 325,824.50 and 128,679.31

Step by Step Solution

1. Step 1: Write the proportion equation
   236,111.58 : 325,824.50 = 128,679.31 : x
2. Step 2: Convert to fraction form
   236,111.58/325,824.50 = 128,679.31/x
3. Step 3: Cross multiply
   236,111.58x = 325,824.50 × 128,679.31
4. Step 4: Simplify right side
   236,111.58x = 41,926,870,383.14
5. Step 5: Solve for x
   x = 41,926,870,383.14/236,111.58
6. Step 6: Final answer
   x = 177,572.27