Finding the Third Proportional to 1,216.50 and 1,616

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.50 : 1,616 = 1,616 : x
2. Step 2: Convert to fraction form
   1,216.50/1,616 = 1,616/x
3. Step 3: Cross multiply
   1,216.50x = 1,616 × 1,616
4. Step 4: Simplify right side
   1,216.50x = 2,611,456
5. Step 5: Solve for x
   x = 2,611,456/1,216.50
6. Step 6: Final answer
   x = 2,146.70