Finding the Fourth Proportional to 236,139.50, 325,872.72 and 128,707.38

Step by Step Solution

1. Step 1: Write the proportion equation
   236,139.50 : 325,872.72 = 128,707.38 : x
2. Step 2: Convert to fraction form
   236,139.50/325,872.72 = 128,707.38/x
3. Step 3: Cross multiply
   236,139.50x = 325,872.72 × 128,707.38
4. Step 4: Simplify right side
   236,139.50x = 41,942,224,004.67
5. Step 5: Solve for x
   x = 41,942,224,004.67/236,139.50
6. Step 6: Final answer
   x = 177,616.30