Finding the Fourth Proportional to 2,158.53, 3,237.86 and 697.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.53 : 3,237.86 = 697.69 : x
2. Step 2: Convert to fraction form
   2,158.53/3,237.86 = 697.69/x
3. Step 3: Cross multiply
   2,158.53x = 3,237.86 × 697.69
4. Step 4: Simplify right side
   2,158.53x = 2,259,022.54
5. Step 5: Solve for x
   x = 2,259,022.54/2,158.53
6. Step 6: Final answer
   x = 1,046.56