Finding the Fourth Proportional to 1,984.80, 2,738.83 and 1,145.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,984.80 : 2,738.83 = 1,145.78 : x
2. Step 2: Convert to fraction form
   1,984.80/2,738.83 = 1,145.78/x
3. Step 3: Cross multiply
   1,984.80x = 2,738.83 × 1,145.78
4. Step 4: Simplify right side
   1,984.80x = 3,138,097.33
5. Step 5: Solve for x
   x = 3,138,097.33/1,984.80
6. Step 6: Final answer
   x = 1,581.06