Finding the Fourth Proportional to 8,112.47, 11,191.92 and 5,725.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,112.47 : 11,191.92 = 5,725.91 : x
2. Step 2: Convert to fraction form
   8,112.47/11,191.92 = 5,725.91/x
3. Step 3: Cross multiply
   8,112.47x = 11,191.92 × 5,725.91
4. Step 4: Simplify right side
   8,112.47x = 64,083,926.65
5. Step 5: Solve for x
   x = 64,083,926.65/8,112.47
6. Step 6: Final answer
   x = 7,899.43