Finding the Fourth Proportional to 2,083.50, 3,121.00 and 1,561.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.50 : 3,121.00 = 1,561.05 : x
2. Step 2: Convert to fraction form
   2,083.50/3,121.00 = 1,561.05/x
3. Step 3: Cross multiply
   2,083.50x = 3,121.00 × 1,561.05
4. Step 4: Simplify right side
   2,083.50x = 4,872,033.15
5. Step 5: Solve for x
   x = 4,872,033.15/2,083.50
6. Step 6: Final answer
   x = 2,338.39