Finding the Fourth Proportional to 1,123.06, 1,684.47 and 353.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.06 : 1,684.47 = 353.50 : x
2. Step 2: Convert to fraction form
   1,123.06/1,684.47 = 353.50/x
3. Step 3: Cross multiply
   1,123.06x = 1,684.47 × 353.50
4. Step 4: Simplify right side
   1,123.06x = 595,460.15
5. Step 5: Solve for x
   x = 595,460.15/1,123.06
6. Step 6: Final answer
   x = 530.21