Finding the Fourth Proportional to 942.72, 1,414.56 and 387.83

Step by Step Solution

1. Step 1: Write the proportion equation
   942.72 : 1,414.56 = 387.83 : x
2. Step 2: Convert to fraction form
   942.72/1,414.56 = 387.83/x
3. Step 3: Cross multiply
   942.72x = 1,414.56 × 387.83
4. Step 4: Simplify right side
   942.72x = 548,601.73
5. Step 5: Solve for x
   x = 548,601.73/942.72
6. Step 6: Final answer
   x = 581.93