Finding the Fourth Proportional to 1,123.37, 1,685.33 and 353.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.37 : 1,685.33 = 353.87 : x
2. Step 2: Convert to fraction form
   1,123.37/1,685.33 = 353.87/x
3. Step 3: Cross multiply
   1,123.37x = 1,685.33 × 353.87
4. Step 4: Simplify right side
   1,123.37x = 596,385.96
5. Step 5: Solve for x
   x = 596,385.96/1,123.37
6. Step 6: Final answer
   x = 530.89