Finding the Fourth Proportional to 1,123.38, 1,685.41 and 575.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.38 : 1,685.41 = 575.95 : x
2. Step 2: Convert to fraction form
   1,123.38/1,685.41 = 575.95/x
3. Step 3: Cross multiply
   1,123.38x = 1,685.41 × 575.95
4. Step 4: Simplify right side
   1,123.38x = 970,711.89
5. Step 5: Solve for x
   x = 970,711.89/1,123.38
6. Step 6: Final answer
   x = 864.10