Finding the Fourth Proportional to 1,439.17, 1,985.92 and 849.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.17 : 1,985.92 = 849.59 : x
2. Step 2: Convert to fraction form
   1,439.17/1,985.92 = 849.59/x
3. Step 3: Cross multiply
   1,439.17x = 1,985.92 × 849.59
4. Step 4: Simplify right side
   1,439.17x = 1,687,213.17
5. Step 5: Solve for x
   x = 1,687,213.17/1,439.17
6. Step 6: Final answer
   x = 1,172.35