Finding the Fourth Proportional to 11,255.87, 16,880.92 and 5,326.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,255.87 : 16,880.92 = 5,326.91 : x
2. Step 2: Convert to fraction form
   11,255.87/16,880.92 = 5,326.91/x
3. Step 3: Cross multiply
   11,255.87x = 16,880.92 × 5,326.91
4. Step 4: Simplify right side
   11,255.87x = 89,923,141.56
5. Step 5: Solve for x
   x = 89,923,141.56/11,255.87
6. Step 6: Final answer
   x = 7,989.00