Finding the Fourth Proportional to 2,158.45, 3,238.20 and 697.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.45 : 3,238.20 = 697.61 : x
2. Step 2: Convert to fraction form
   2,158.45/3,238.20 = 697.61/x
3. Step 3: Cross multiply
   2,158.45x = 3,238.20 × 697.61
4. Step 4: Simplify right side
   2,158.45x = 2,259,008.80
5. Step 5: Solve for x
   x = 2,259,008.80/2,158.45
6. Step 6: Final answer
   x = 1,046.59