Finding the Fourth Proportional to 2,083.55, 3,123.50 and 851.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,083.55 : 3,123.50 = 851.13 : x
2. Step 2: Convert to fraction form
   2,083.55/3,123.50 = 851.13/x
3. Step 3: Cross multiply
   2,083.55x = 3,123.50 × 851.13
4. Step 4: Simplify right side
   2,083.55x = 2,658,500.30
5. Step 5: Solve for x
   x = 2,658,500.30/2,083.55
6. Step 6: Final answer
   x = 1,275.95