Finding the Fourth Proportional to 1,123.25, 1,685.00 and 575.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.25 : 1,685.00 = 575.56 : x
2. Step 2: Convert to fraction form
   1,123.25/1,685.00 = 575.56/x
3. Step 3: Cross multiply
   1,123.25x = 1,685.00 × 575.56
4. Step 4: Simplify right side
   1,123.25x = 969,822.15
5. Step 5: Solve for x
   x = 969,822.15/1,123.25
6. Step 6: Final answer
   x = 863.41