Finding the Fourth Proportional to 2,699.69, 4,047.57 and 849.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,699.69 : 4,047.57 = 849.78 : x
2. Step 2: Convert to fraction form
   2,699.69/4,047.57 = 849.78/x
3. Step 3: Cross multiply
   2,699.69x = 4,047.57 × 849.78
4. Step 4: Simplify right side
   2,699.69x = 3,439,544.03
5. Step 5: Solve for x
   x = 3,439,544.03/2,699.69
6. Step 6: Final answer
   x = 1,274.05