Finding the Fourth Proportional to 2,789.66, 3,846.54 and 2,620.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789.66 : 3,846.54 = 2,620.16 : x
2. Step 2: Convert to fraction form
   2,789.66/3,846.54 = 2,620.16/x
3. Step 3: Cross multiply
   2,789.66x = 3,846.54 × 2,620.16
4. Step 4: Simplify right side
   2,789.66x = 10,078,550.25
5. Step 5: Solve for x
   x = 10,078,550.25/2,789.66
6. Step 6: Final answer
   x = 3,612.82