Finding the Fourth Proportional to 2,081.91, 3,123.41 and 986.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.91 : 3,123.41 = 986.25 : x
2. Step 2: Convert to fraction form
   2,081.91/3,123.41 = 986.25/x
3. Step 3: Cross multiply
   2,081.91x = 3,123.41 × 986.25
4. Step 4: Simplify right side
   2,081.91x = 3,080,463.11
5. Step 5: Solve for x
   x = 3,080,463.11/2,081.91
6. Step 6: Final answer
   x = 1,479.63