Finding the Fourth Proportional to 236,360.25, 326,171.61 and 128,931.12

Step by Step Solution

1. Step 1: Write the proportion equation
   236,360.25 : 326,171.61 = 128,931.12 : x
2. Step 2: Convert to fraction form
   236,360.25/326,171.61 = 128,931.12/x
3. Step 3: Cross multiply
   236,360.25x = 326,171.61 × 128,931.12
4. Step 4: Simplify right side
   236,360.25x = 42,053,670,989.50
5. Step 5: Solve for x
   x = 42,053,670,989.50/236,360.25
6. Step 6: Final answer
   x = 177,921.93