Finding the Fourth Proportional to 2,158.76, 3,238.07 and 697.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.76 : 3,238.07 = 697.88 : x
2. Step 2: Convert to fraction form
   2,158.76/3,238.07 = 697.88/x
3. Step 3: Cross multiply
   2,158.76x = 3,238.07 × 697.88
4. Step 4: Simplify right side
   2,158.76x = 2,259,764.61
5. Step 5: Solve for x
   x = 2,259,764.61/2,158.76
6. Step 6: Final answer
   x = 1,046.79