Finding the Fourth Proportional to 2,078.22, 3,117.57 and 617.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.22 : 3,117.57 = 617.10 : x
2. Step 2: Convert to fraction form
   2,078.22/3,117.57 = 617.10/x
3. Step 3: Cross multiply
   2,078.22x = 3,117.57 × 617.10
4. Step 4: Simplify right side
   2,078.22x = 1,923,852.45
5. Step 5: Solve for x
   x = 1,923,852.45/2,078.22
6. Step 6: Final answer
   x = 925.72