Finding the Fourth Proportional to 3,989.37, 5,508.82 and 2,499.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989.37 : 5,508.82 = 2,499.86 : x
2. Step 2: Convert to fraction form
   3,989.37/5,508.82 = 2,499.86/x
3. Step 3: Cross multiply
   3,989.37x = 5,508.82 × 2,499.86
4. Step 4: Simplify right side
   3,989.37x = 13,771,238.72
5. Step 5: Solve for x
   x = 13,771,238.72/3,989.37
6. Step 6: Final answer
   x = 3,451.98