Finding the Fourth Proportional to 2,078.05, 3,113.29 and 1,209.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.05 : 3,113.29 = 1,209.73 : x
2. Step 2: Convert to fraction form
   2,078.05/3,113.29 = 1,209.73/x
3. Step 3: Cross multiply
   2,078.05x = 3,113.29 × 1,209.73
4. Step 4: Simplify right side
   2,078.05x = 3,766,240.31
5. Step 5: Solve for x
   x = 3,766,240.31/2,078.05
6. Step 6: Final answer
   x = 1,812.39