Finding the Fourth Proportional to 2,007.68, 2,770.72 and 1,309.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.68 : 2,770.72 = 1,309.04 : x
2. Step 2: Convert to fraction form
   2,007.68/2,770.72 = 1,309.04/x
3. Step 3: Cross multiply
   2,007.68x = 2,770.72 × 1,309.04
4. Step 4: Simplify right side
   2,007.68x = 3,626,983.31
5. Step 5: Solve for x
   x = 3,626,983.31/2,007.68
6. Step 6: Final answer
   x = 1,806.55