Finding the Fourth Proportional to 8,797.74, 12,142.09 and 5,396.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,797.74 : 12,142.09 = 5,396.79 : x
2. Step 2: Convert to fraction form
   8,797.74/12,142.09 = 5,396.79/x
3. Step 3: Cross multiply
   8,797.74x = 12,142.09 × 5,396.79
4. Step 4: Simplify right side
   8,797.74x = 65,528,309.89
5. Step 5: Solve for x
   x = 65,528,309.89/8,797.74
6. Step 6: Final answer
   x = 7,448.31