Finding the Fourth Proportional to 8,679.24, 13,016.17 and 3,131.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,679.24 : 13,016.17 = 3,131.86 : x
2. Step 2: Convert to fraction form
   8,679.24/13,016.17 = 3,131.86/x
3. Step 3: Cross multiply
   8,679.24x = 13,016.17 × 3,131.86
4. Step 4: Simplify right side
   8,679.24x = 40,764,800.34
5. Step 5: Solve for x
   x = 40,764,800.34/8,679.24
6. Step 6: Final answer
   x = 4,696.82