Finding the Fourth Proportional to 2,158.32, 3,238.14 and 859.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.32 : 3,238.14 = 859.08 : x
2. Step 2: Convert to fraction form
   2,158.32/3,238.14 = 859.08/x
3. Step 3: Cross multiply
   2,158.32x = 3,238.14 × 859.08
4. Step 4: Simplify right side
   2,158.32x = 2,781,821.31
5. Step 5: Solve for x
   x = 2,781,821.31/2,158.32
6. Step 6: Final answer
   x = 1,288.88