Finding the Fourth Proportional to 1,077.89, 1,616.43 and 849.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.89 : 1,616.43 = 849.47 : x
2. Step 2: Convert to fraction form
   1,077.89/1,616.43 = 849.47/x
3. Step 3: Cross multiply
   1,077.89x = 1,616.43 × 849.47
4. Step 4: Simplify right side
   1,077.89x = 1,373,108.79
5. Step 5: Solve for x
   x = 1,373,108.79/1,077.89
6. Step 6: Final answer
   x = 1,273.89