Finding the Fourth Proportional to 1,123.37, 1,685.05 and 575.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.37 : 1,685.05 = 575.25 : x
2. Step 2: Convert to fraction form
   1,123.37/1,685.05 = 575.25/x
3. Step 3: Cross multiply
   1,123.37x = 1,685.05 × 575.25
4. Step 4: Simplify right side
   1,123.37x = 969,316.59
5. Step 5: Solve for x
   x = 969,316.59/1,123.37
6. Step 6: Final answer
   x = 862.87