Finding the Fourth Proportional to 1,424.54, 2,136.27 and 654.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.54 : 2,136.27 = 654.50 : x
2. Step 2: Convert to fraction form
   1,424.54/2,136.27 = 654.50/x
3. Step 3: Cross multiply
   1,424.54x = 2,136.27 × 654.50
4. Step 4: Simplify right side
   1,424.54x = 1,398,188.72
5. Step 5: Solve for x
   x = 1,398,188.72/1,424.54
6. Step 6: Final answer
   x = 981.50