Finding the Fourth Proportional to 2,118, 3,162.12 and 1,809.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118 : 3,162.12 = 1,809.96 : x
2. Step 2: Convert to fraction form
   2,118/3,162.12 = 1,809.96/x
3. Step 3: Cross multiply
   2,118x = 3,162.12 × 1,809.96
4. Step 4: Simplify right side
   2,118x = 5,723,310.72
5. Step 5: Solve for x
   x = 5,723,310.72/2,118
6. Step 6: Final answer
   x = 2,702.22