Finding the Fourth Proportional to 9,122.16, 12,589.35 and 5,144.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,122.16 : 12,589.35 = 5,144.10 : x
2. Step 2: Convert to fraction form
   9,122.16/12,589.35 = 5,144.10/x
3. Step 3: Cross multiply
   9,122.16x = 12,589.35 × 5,144.10
4. Step 4: Simplify right side
   9,122.16x = 64,760,849.61
5. Step 5: Solve for x
   x = 64,760,849.61/9,122.16
6. Step 6: Final answer
   x = 7,099.29