Finding the Fourth Proportional to 2,158.12, 3,233.61 and 2,077.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.12 : 3,233.61 = 2,077.20 : x
2. Step 2: Convert to fraction form
   2,158.12/3,233.61 = 2,077.20/x
3. Step 3: Cross multiply
   2,158.12x = 3,233.61 × 2,077.20
4. Step 4: Simplify right side
   2,158.12x = 6,716,854.69
5. Step 5: Solve for x
   x = 6,716,854.69/2,158.12
6. Step 6: Final answer
   x = 3,112.36