Finding the Fourth Proportional to 3,991.83, 5,508.57 and 2,223.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.83 : 5,508.57 = 2,223.39 : x
2. Step 2: Convert to fraction form
   3,991.83/5,508.57 = 2,223.39/x
3. Step 3: Cross multiply
   3,991.83x = 5,508.57 × 2,223.39
4. Step 4: Simplify right side
   3,991.83x = 12,247,699.45
5. Step 5: Solve for x
   x = 12,247,699.45/3,991.83
6. Step 6: Final answer
   x = 3,068.19