Finding the Fourth Proportional to 11,026.72, 15,216.81 and 5,990.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,026.72 : 15,216.81 = 5,990.91 : x
2. Step 2: Convert to fraction form
   11,026.72/15,216.81 = 5,990.91/x
3. Step 3: Cross multiply
   11,026.72x = 15,216.81 × 5,990.91
4. Step 4: Simplify right side
   11,026.72x = 91,162,539.20
5. Step 5: Solve for x
   x = 91,162,539.20/11,026.72
6. Step 6: Final answer
   x = 8,267.42