Finding the Fourth Proportional to 3,688.34, 5,521.57 and 2,223.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,688.34 : 5,521.57 = 2,223.05 : x
2. Step 2: Convert to fraction form
   3,688.34/5,521.57 = 2,223.05/x
3. Step 3: Cross multiply
   3,688.34x = 5,521.57 × 2,223.05
4. Step 4: Simplify right side
   3,688.34x = 12,274,693.02
5. Step 5: Solve for x
   x = 12,274,693.02/3,688.34
6. Step 6: Final answer
   x = 3,327.98