Finding the Fourth Proportional to 2,158.52, 3,238.24 and 697.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.52 : 3,238.24 = 697.78 : x
2. Step 2: Convert to fraction form
   2,158.52/3,238.24 = 697.78/x
3. Step 3: Cross multiply
   2,158.52x = 3,238.24 × 697.78
4. Step 4: Simplify right side
   2,158.52x = 2,259,579.11
5. Step 5: Solve for x
   x = 2,259,579.11/2,158.52
6. Step 6: Final answer
   x = 1,046.82