Finding the Fourth Proportional to 2,168.23, 2,989.18 and 1,371.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.23 : 2,989.18 = 1,371.16 : x
2. Step 2: Convert to fraction form
   2,168.23/2,989.18 = 1,371.16/x
3. Step 3: Cross multiply
   2,168.23x = 2,989.18 × 1,371.16
4. Step 4: Simplify right side
   2,168.23x = 4,098,638.82
5. Step 5: Solve for x
   x = 4,098,638.82/2,168.23
6. Step 6: Final answer
   x = 1,890.31