Finding the Fourth Proportional to 7,078.66, 10,618.71 and 2,920.42

Step by Step Solution

1. Step 1: Write the proportion equation
   7,078.66 : 10,618.71 = 2,920.42 : x
2. Step 2: Convert to fraction form
   7,078.66/10,618.71 = 2,920.42/x
3. Step 3: Cross multiply
   7,078.66x = 10,618.71 × 2,920.42
4. Step 4: Simplify right side
   7,078.66x = 31,011,093.06
5. Step 5: Solve for x
   x = 31,011,093.06/7,078.66
6. Step 6: Final answer
   x = 4,380.93