Finding the Fourth Proportional to 13,298.28, 18,350.82 and 7,708.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,298.28 : 18,350.82 = 7,708.20 : x
2. Step 2: Convert to fraction form
   13,298.28/18,350.82 = 7,708.20/x
3. Step 3: Cross multiply
   13,298.28x = 18,350.82 × 7,708.20
4. Step 4: Simplify right side
   13,298.28x = 141,451,790.72
5. Step 5: Solve for x
   x = 141,451,790.72/13,298.28
6. Step 6: Final answer
   x = 10,636.85