Finding the Fourth Proportional to 1,559.13, 2,339.55 and 693.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.13 : 2,339.55 = 693.42 : x
2. Step 2: Convert to fraction form
   1,559.13/2,339.55 = 693.42/x
3. Step 3: Cross multiply
   1,559.13x = 2,339.55 × 693.42
4. Step 4: Simplify right side
   1,559.13x = 1,622,290.76
5. Step 5: Solve for x
   x = 1,622,290.76/1,559.13
6. Step 6: Final answer
   x = 1,040.51