Finding the Fourth Proportional to 9,038.28, 12,471.06 and 5,679.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,038.28 : 12,471.06 = 5,679.15 : x
2. Step 2: Convert to fraction form
   9,038.28/12,471.06 = 5,679.15/x
3. Step 3: Cross multiply
   9,038.28x = 12,471.06 × 5,679.15
4. Step 4: Simplify right side
   9,038.28x = 70,825,020.40
5. Step 5: Solve for x
   x = 70,825,020.40/9,038.28
6. Step 6: Final answer
   x = 7,836.12