Finding the Fourth Proportional to 1,243.29, 1,863.72 and 462.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.29 : 1,863.72 = 462.72 : x
2. Step 2: Convert to fraction form
   1,243.29/1,863.72 = 462.72/x
3. Step 3: Cross multiply
   1,243.29x = 1,863.72 × 462.72
4. Step 4: Simplify right side
   1,243.29x = 862,380.52
5. Step 5: Solve for x
   x = 862,380.52/1,243.29
6. Step 6: Final answer
   x = 693.63