Finding the Fourth Proportional to 2,758.69, 3,806.22 and 2,620.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,758.69 : 3,806.22 = 2,620.18 : x
2. Step 2: Convert to fraction form
   2,758.69/3,806.22 = 2,620.18/x
3. Step 3: Cross multiply
   2,758.69x = 3,806.22 × 2,620.18
4. Step 4: Simplify right side
   2,758.69x = 9,972,981.52
5. Step 5: Solve for x
   x = 9,972,981.52/2,758.69
6. Step 6: Final answer
   x = 3,615.11