Finding the Fourth Proportional to 2,083.17, 3,122.31 and 986.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.17 : 3,122.31 = 986.04 : x
2. Step 2: Convert to fraction form
   2,083.17/3,122.31 = 986.04/x
3. Step 3: Cross multiply
   2,083.17x = 3,122.31 × 986.04
4. Step 4: Simplify right side
   2,083.17x = 3,078,722.55
5. Step 5: Solve for x
   x = 3,078,722.55/2,083.17
6. Step 6: Final answer
   x = 1,477.90