Finding the Fourth Proportional to 2,619.83, 3,928.57 and 1,233.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.83 : 3,928.57 = 1,233.56 : x
2. Step 2: Convert to fraction form
   2,619.83/3,928.57 = 1,233.56/x
3. Step 3: Cross multiply
   2,619.83x = 3,928.57 × 1,233.56
4. Step 4: Simplify right side
   2,619.83x = 4,846,126.81
5. Step 5: Solve for x
   x = 4,846,126.81/2,619.83
6. Step 6: Final answer
   x = 1,849.79