Finding the Fourth Proportional to 1,563.42, 2,343.33 and 685.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.42 : 2,343.33 = 685.59 : x
2. Step 2: Convert to fraction form
   1,563.42/2,343.33 = 685.59/x
3. Step 3: Cross multiply
   1,563.42x = 2,343.33 × 685.59
4. Step 4: Simplify right side
   1,563.42x = 1,606,563.61
5. Step 5: Solve for x
   x = 1,606,563.61/1,563.42
6. Step 6: Final answer
   x = 1,027.60