Finding the Fourth Proportional to 2,081.39, 3,123.09 and 985.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.39 : 3,123.09 = 985.14 : x
2. Step 2: Convert to fraction form
   2,081.39/3,123.09 = 985.14/x
3. Step 3: Cross multiply
   2,081.39x = 3,123.09 × 985.14
4. Step 4: Simplify right side
   2,081.39x = 3,076,680.88
5. Step 5: Solve for x
   x = 3,076,680.88/2,081.39
6. Step 6: Final answer
   x = 1,478.19