Finding the Fourth Proportional to 1,123.80, 1,683.81 and 567.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.80 : 1,683.81 = 567.77 : x
2. Step 2: Convert to fraction form
   1,123.80/1,683.81 = 567.77/x
3. Step 3: Cross multiply
   1,123.80x = 1,683.81 × 567.77
4. Step 4: Simplify right side
   1,123.80x = 956,008.38
5. Step 5: Solve for x
   x = 956,008.38/1,123.80
6. Step 6: Final answer
   x = 850.69