Finding the Fourth Proportional to 2,553.72, 3,521.22 and 2,180.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.72 : 3,521.22 = 2,180.04 : x
2. Step 2: Convert to fraction form
   2,553.72/3,521.22 = 2,180.04/x
3. Step 3: Cross multiply
   2,553.72x = 3,521.22 × 2,180.04
4. Step 4: Simplify right side
   2,553.72x = 7,676,400.45
5. Step 5: Solve for x
   x = 7,676,400.45/2,553.72
6. Step 6: Final answer
   x = 3,005.97