Finding the Fourth Proportional to 2,168.76, 2,993.07 and 1,284.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.76 : 2,993.07 = 1,284.78 : x
2. Step 2: Convert to fraction form
   2,168.76/2,993.07 = 1,284.78/x
3. Step 3: Cross multiply
   2,168.76x = 2,993.07 × 1,284.78
4. Step 4: Simplify right side
   2,168.76x = 3,845,436.47
5. Step 5: Solve for x
   x = 3,845,436.47/2,168.76
6. Step 6: Final answer
   x = 1,773.10