Finding the Fourth Proportional to 2,122.89, 3,167.31 and 1,811.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,122.89 : 3,167.31 = 1,811.18 : x
2. Step 2: Convert to fraction form
   2,122.89/3,167.31 = 1,811.18/x
3. Step 3: Cross multiply
   2,122.89x = 3,167.31 × 1,811.18
4. Step 4: Simplify right side
   2,122.89x = 5,736,552.69
5. Step 5: Solve for x
   x = 5,736,552.69/2,122.89
6. Step 6: Final answer
   x = 2,702.24