Finding the Fourth Proportional to 3,111.50, 4,291.62 and 2,167.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.50 : 4,291.62 = 2,167.61 : x
2. Step 2: Convert to fraction form
   3,111.50/4,291.62 = 2,167.61/x
3. Step 3: Cross multiply
   3,111.50x = 4,291.62 × 2,167.61
4. Step 4: Simplify right side
   3,111.50x = 9,302,536.97
5. Step 5: Solve for x
   x = 9,302,536.97/3,111.50
6. Step 6: Final answer
   x = 2,989.73