Finding the Fourth Proportional to 1,123.13, 1,685.71 and 575.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.13 : 1,685.71 = 575.69 : x
2. Step 2: Convert to fraction form
   1,123.13/1,685.71 = 575.69/x
3. Step 3: Cross multiply
   1,123.13x = 1,685.71 × 575.69
4. Step 4: Simplify right side
   1,123.13x = 970,446.39
5. Step 5: Solve for x
   x = 970,446.39/1,123.13
6. Step 6: Final answer
   x = 864.06