Finding the Fourth Proportional to 1,559.88, 2,340.18 and 830.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.88 : 2,340.18 = 830.16 : x
2. Step 2: Convert to fraction form
   1,559.88/2,340.18 = 830.16/x
3. Step 3: Cross multiply
   1,559.88x = 2,340.18 × 830.16
4. Step 4: Simplify right side
   1,559.88x = 1,942,723.83
5. Step 5: Solve for x
   x = 1,942,723.83/1,559.88
6. Step 6: Final answer
   x = 1,245.43