Finding the Fourth Proportional to 128,205.52, 175,981.94 and 113,742.16

Step by Step Solution

1. Step 1: Write the proportion equation
   128,205.52 : 175,981.94 = 113,742.16 : x
2. Step 2: Convert to fraction form
   128,205.52/175,981.94 = 113,742.16/x
3. Step 3: Cross multiply
   128,205.52x = 175,981.94 × 113,742.16
4. Step 4: Simplify right side
   128,205.52x = 20,016,565,976.59
5. Step 5: Solve for x
   x = 20,016,565,976.59/128,205.52
6. Step 6: Final answer
   x = 156,128.74