Finding the Fourth Proportional to 1,464.72, 2,196.72 and 424.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,464.72 : 2,196.72 = 424.72 : x
2. Step 2: Convert to fraction form
   1,464.72/2,196.72 = 424.72/x
3. Step 3: Cross multiply
   1,464.72x = 2,196.72 × 424.72
4. Step 4: Simplify right side
   1,464.72x = 932,990.92
5. Step 5: Solve for x
   x = 932,990.92/1,464.72
6. Step 6: Final answer
   x = 636.98