Finding the Fourth Proportional to 2,118.91, 3,179.18 and 1,023.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.91 : 3,179.18 = 1,023.18 : x
2. Step 2: Convert to fraction form
   2,118.91/3,179.18 = 1,023.18/x
3. Step 3: Cross multiply
   2,118.91x = 3,179.18 × 1,023.18
4. Step 4: Simplify right side
   2,118.91x = 3,252,873.39
5. Step 5: Solve for x
   x = 3,252,873.39/2,118.91
6. Step 6: Final answer
   x = 1,535.16