Finding the Fourth Proportional to 1,123.10, 1,685.69 and 568.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.10 : 1,685.69 = 568.20 : x
2. Step 2: Convert to fraction form
   1,123.10/1,685.69 = 568.20/x
3. Step 3: Cross multiply
   1,123.10x = 1,685.69 × 568.20
4. Step 4: Simplify right side
   1,123.10x = 957,808.35
5. Step 5: Solve for x
   x = 957,808.35/1,123.10
6. Step 6: Final answer
   x = 852.82