Finding the Fourth Proportional to 2,158.42, 2,976.60 and 1,717.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.42 : 2,976.60 = 1,717.78 : x
2. Step 2: Convert to fraction form
   2,158.42/2,976.60 = 1,717.78/x
3. Step 3: Cross multiply
   2,158.42x = 2,976.60 × 1,717.78
4. Step 4: Simplify right side
   2,158.42x = 5,113,143.95
5. Step 5: Solve for x
   x = 5,113,143.95/2,158.42
6. Step 6: Final answer
   x = 2,368.93