Finding the Fourth Proportional to 2,288.66, 3,158.55 and 1,294.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.66 : 3,158.55 = 1,294.12 : x
2. Step 2: Convert to fraction form
   2,288.66/3,158.55 = 1,294.12/x
3. Step 3: Cross multiply
   2,288.66x = 3,158.55 × 1,294.12
4. Step 4: Simplify right side
   2,288.66x = 4,087,534.83
5. Step 5: Solve for x
   x = 4,087,534.83/2,288.66
6. Step 6: Final answer
   x = 1,785.99