Finding the Fourth Proportional to 2,553.06, 3,826.32 and 1,320.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.06 : 3,826.32 = 1,320.24 : x
2. Step 2: Convert to fraction form
   2,553.06/3,826.32 = 1,320.24/x
3. Step 3: Cross multiply
   2,553.06x = 3,826.32 × 1,320.24
4. Step 4: Simplify right side
   2,553.06x = 5,051,660.72
5. Step 5: Solve for x
   x = 5,051,660.72/2,553.06
6. Step 6: Final answer
   x = 1,978.67