Finding the Fourth Proportional to 2,078.57, 3,118.02 and 617.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.57 : 3,118.02 = 617.72 : x
2. Step 2: Convert to fraction form
   2,078.57/3,118.02 = 617.72/x
3. Step 3: Cross multiply
   2,078.57x = 3,118.02 × 617.72
4. Step 4: Simplify right side
   2,078.57x = 1,926,057.10
5. Step 5: Solve for x
   x = 1,926,057.10/2,078.57
6. Step 6: Final answer
   x = 926.63