Finding the Fourth Proportional to 1,123.38, 1,684.35 and 738.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.38 : 1,684.35 = 738.18 : x
2. Step 2: Convert to fraction form
   1,123.38/1,684.35 = 738.18/x
3. Step 3: Cross multiply
   1,123.38x = 1,684.35 × 738.18
4. Step 4: Simplify right side
   1,123.38x = 1,243,353.48
5. Step 5: Solve for x
   x = 1,243,353.48/1,123.38
6. Step 6: Final answer
   x = 1,106.80