Finding the Fourth Proportional to 9,216.05, 12,719.67 and 5,440.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,216.05 : 12,719.67 = 5,440.13 : x
2. Step 2: Convert to fraction form
   9,216.05/12,719.67 = 5,440.13/x
3. Step 3: Cross multiply
   9,216.05x = 12,719.67 × 5,440.13
4. Step 4: Simplify right side
   9,216.05x = 69,196,622.06
5. Step 5: Solve for x
   x = 69,196,622.06/9,216.05
6. Step 6: Final answer
   x = 7,508.28