Finding the Fourth Proportional to 144,785.12, 199,800.96 and 81,122.72

Step by Step Solution

1. Step 1: Write the proportion equation
   144,785.12 : 199,800.96 = 81,122.72 : x
2. Step 2: Convert to fraction form
   144,785.12/199,800.96 = 81,122.72/x
3. Step 3: Cross multiply
   144,785.12x = 199,800.96 × 81,122.72
4. Step 4: Simplify right side
   144,785.12x = 16,208,397,333.81
5. Step 5: Solve for x
   x = 16,208,397,333.81/144,785.12
6. Step 6: Final answer
   x = 111,947.95