Finding the Fourth Proportional to 1,559.86, 2,338.57 and 694.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.86 : 2,338.57 = 694.78 : x
2. Step 2: Convert to fraction form
   1,559.86/2,338.57 = 694.78/x
3. Step 3: Cross multiply
   1,559.86x = 2,338.57 × 694.78
4. Step 4: Simplify right side
   1,559.86x = 1,624,786.69
5. Step 5: Solve for x
   x = 1,624,786.69/1,559.86
6. Step 6: Final answer
   x = 1,041.63