Finding the Fourth Proportional to 3,991.86, 5,508.94 and 2,223.47

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.86 : 5,508.94 = 2,223.47 : x
2. Step 2: Convert to fraction form
   3,991.86/5,508.94 = 2,223.47/x
3. Step 3: Cross multiply
   3,991.86x = 5,508.94 × 2,223.47
4. Step 4: Simplify right side
   3,991.86x = 12,248,929.72
5. Step 5: Solve for x
   x = 12,248,929.72/3,991.86
6. Step 6: Final answer
   x = 3,068.48