Finding the Fourth Proportional to 2,165.89, 2,989.40 and 1,368.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,165.89 : 2,989.40 = 1,368.71 : x
2. Step 2: Convert to fraction form
   2,165.89/2,989.40 = 1,368.71/x
3. Step 3: Cross multiply
   2,165.89x = 2,989.40 × 1,368.71
4. Step 4: Simplify right side
   2,165.89x = 4,091,617.22
5. Step 5: Solve for x
   x = 4,091,617.22/2,165.89
6. Step 6: Final answer
   x = 1,889.11