Finding the Fourth Proportional to 10,216.48, 14,099.39 and 5,679.67

Step by Step Solution

1. Step 1: Write the proportion equation
   10,216.48 : 14,099.39 = 5,679.67 : x
2. Step 2: Convert to fraction form
   10,216.48/14,099.39 = 5,679.67/x
3. Step 3: Cross multiply
   10,216.48x = 14,099.39 × 5,679.67
4. Step 4: Simplify right side
   10,216.48x = 80,079,882.40
5. Step 5: Solve for x
   x = 80,079,882.40/10,216.48
6. Step 6: Final answer
   x = 7,838.30