Finding the Fourth Proportional to 9,013.20, 12,434.60 and 5,871.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,013.20 : 12,434.60 = 5,871.12 : x
2. Step 2: Convert to fraction form
   9,013.20/12,434.60 = 5,871.12/x
3. Step 3: Cross multiply
   9,013.20x = 12,434.60 × 5,871.12
4. Step 4: Simplify right side
   9,013.20x = 73,005,028.75
5. Step 5: Solve for x
   x = 73,005,028.75/9,013.20
6. Step 6: Final answer
   x = 8,099.79