Finding the Fourth Proportional to 2,293.56, 3,439.78 and 1,059.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,293.56 : 3,439.78 = 1,059.78 : x
2. Step 2: Convert to fraction form
   2,293.56/3,439.78 = 1,059.78/x
3. Step 3: Cross multiply
   2,293.56x = 3,439.78 × 1,059.78
4. Step 4: Simplify right side
   2,293.56x = 3,645,410.05
5. Step 5: Solve for x
   x = 3,645,410.05/2,293.56
6. Step 6: Final answer
   x = 1,589.41