Finding the Fourth Proportional to 2,085.89, 3,124.58 and 986.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.89 : 3,124.58 = 986.93 : x
2. Step 2: Convert to fraction form
   2,085.89/3,124.58 = 986.93/x
3. Step 3: Cross multiply
   2,085.89x = 3,124.58 × 986.93
4. Step 4: Simplify right side
   2,085.89x = 3,083,728.58
5. Step 5: Solve for x
   x = 3,083,728.58/2,085.89
6. Step 6: Final answer
   x = 1,478.37