Finding the Fourth Proportional to 1,424.72, 2,136.36 and 731.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.72 : 2,136.36 = 731.24 : x
2. Step 2: Convert to fraction form
   1,424.72/2,136.36 = 731.24/x
3. Step 3: Cross multiply
   1,424.72x = 2,136.36 × 731.24
4. Step 4: Simplify right side
   1,424.72x = 1,562,191.89
5. Step 5: Solve for x
   x = 1,562,191.89/1,424.72
6. Step 6: Final answer
   x = 1,096.49