Finding the Fourth Proportional to 9,215.93, 12,717.61 and 5,439.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,215.93 : 12,717.61 = 5,439.24 : x
2. Step 2: Convert to fraction form
   9,215.93/12,717.61 = 5,439.24/x
3. Step 3: Cross multiply
   9,215.93x = 12,717.61 × 5,439.24
4. Step 4: Simplify right side
   9,215.93x = 69,174,119.42
5. Step 5: Solve for x
   x = 69,174,119.42/9,215.93
6. Step 6: Final answer
   x = 7,505.93