Finding the Third Proportional to 1,222.50 and 2,688

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.50 : 2,688 = 2,688 : x
2. Step 2: Convert to fraction form
   1,222.50/2,688 = 2,688/x
3. Step 3: Cross multiply
   1,222.50x = 2,688 × 2,688
4. Step 4: Simplify right side
   1,222.50x = 7,225,344
5. Step 5: Solve for x
   x = 7,225,344/1,222.50
6. Step 6: Final answer
   x = 5,910.30