Finding the Fourth Proportional to 3,948.35, 5,448.87 and 2,223.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,948.35 : 5,448.87 = 2,223.72 : x
2. Step 2: Convert to fraction form
   3,948.35/5,448.87 = 2,223.72/x
3. Step 3: Cross multiply
   3,948.35x = 5,448.87 × 2,223.72
4. Step 4: Simplify right side
   3,948.35x = 12,116,761.20
5. Step 5: Solve for x
   x = 12,116,761.20/3,948.35
6. Step 6: Final answer
   x = 3,068.82