Finding the Fourth Proportional to 11,025.98, 15,215.72 and 5,990.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,025.98 : 15,215.72 = 5,990.09 : x
2. Step 2: Convert to fraction form
   11,025.98/15,215.72 = 5,990.09/x
3. Step 3: Cross multiply
   11,025.98x = 15,215.72 × 5,990.09
4. Step 4: Simplify right side
   11,025.98x = 91,143,532.21
5. Step 5: Solve for x
   x = 91,143,532.21/11,025.98
6. Step 6: Final answer
   x = 8,266.25