Finding the Fourth Proportional to 8,111.97, 11,191.23 and 5,725.41

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.97 : 11,191.23 = 5,725.41 : x
2. Step 2: Convert to fraction form
   8,111.97/11,191.23 = 5,725.41/x
3. Step 3: Cross multiply
   8,111.97x = 11,191.23 × 5,725.41
4. Step 4: Simplify right side
   8,111.97x = 64,074,380.15
5. Step 5: Solve for x
   x = 64,074,380.15/8,111.97
6. Step 6: Final answer
   x = 7,898.74