Finding the Fourth Proportional to 236,111.89, 325,838.43 and 128,687.81

Step by Step Solution

1. Step 1: Write the proportion equation
   236,111.89 : 325,838.43 = 128,687.81 : x
2. Step 2: Convert to fraction form
   236,111.89/325,838.43 = 128,687.81/x
3. Step 3: Cross multiply
   236,111.89x = 325,838.43 × 128,687.81
4. Step 4: Simplify right side
   236,111.89x = 41,931,433,970.54
5. Step 5: Solve for x
   x = 41,931,433,970.54/236,111.89
6. Step 6: Final answer
   x = 177,591.37