Finding the Fourth Proportional to 2,168.81, 2,993.34 and 1,285.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.81 : 2,993.34 = 1,285.05 : x
2. Step 2: Convert to fraction form
   2,168.81/2,993.34 = 1,285.05/x
3. Step 3: Cross multiply
   2,168.81x = 2,993.34 × 1,285.05
4. Step 4: Simplify right side
   2,168.81x = 3,846,591.57
5. Step 5: Solve for x
   x = 3,846,591.57/2,168.81
6. Step 6: Final answer
   x = 1,773.60