Finding the Fourth Proportional to 2,083.59, 3,123.29 and 985.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.59 : 3,123.29 = 985.99 : x
2. Step 2: Convert to fraction form
   2,083.59/3,123.29 = 985.99/x
3. Step 3: Cross multiply
   2,083.59x = 3,123.29 × 985.99
4. Step 4: Simplify right side
   2,083.59x = 3,079,532.71
5. Step 5: Solve for x
   x = 3,079,532.71/2,083.59
6. Step 6: Final answer
   x = 1,477.99