Finding the Fourth Proportional to 1,124.05, 1,685.83 and 354.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,124.05 : 1,685.83 = 354.13 : x
2. Step 2: Convert to fraction form
   1,124.05/1,685.83 = 354.13/x
3. Step 3: Cross multiply
   1,124.05x = 1,685.83 × 354.13
4. Step 4: Simplify right side
   1,124.05x = 597,002.98
5. Step 5: Solve for x
   x = 597,002.98/1,124.05
6. Step 6: Final answer
   x = 531.12