Finding the Fourth Proportional to 2,220.72, 3,328.68 and 1,788.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,220.72 : 3,328.68 = 1,788.24 : x
2. Step 2: Convert to fraction form
   2,220.72/3,328.68 = 1,788.24/x
3. Step 3: Cross multiply
   2,220.72x = 3,328.68 × 1,788.24
4. Step 4: Simplify right side
   2,220.72x = 5,952,478.72
5. Step 5: Solve for x
   x = 5,952,478.72/2,220.72
6. Step 6: Final answer
   x = 2,680.43