Finding the Fourth Proportional to 141,311.72, 194,815.31 and 112,728.39

Step by Step Solution

1. Step 1: Write the proportion equation
   141,311.72 : 194,815.31 = 112,728.39 : x
2. Step 2: Convert to fraction form
   141,311.72/194,815.31 = 112,728.39/x
3. Step 3: Cross multiply
   141,311.72x = 194,815.31 × 112,728.39
4. Step 4: Simplify right side
   141,311.72x = 21,961,215,680.01
5. Step 5: Solve for x
   x = 21,961,215,680.01/141,311.72
6. Step 6: Final answer
   x = 155,409.73