Finding the Fourth Proportional to 3,991.14, 5,508.61 and 2,397.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.14 : 5,508.61 = 2,397.86 : x
2. Step 2: Convert to fraction form
   3,991.14/5,508.61 = 2,397.86/x
3. Step 3: Cross multiply
   3,991.14x = 5,508.61 × 2,397.86
4. Step 4: Simplify right side
   3,991.14x = 13,208,862.69
5. Step 5: Solve for x
   x = 13,208,862.69/3,991.14
6. Step 6: Final answer
   x = 3,309.55