Finding the Third Proportional to 561.03 and 1,211.69

Step by Step Solution

1. Step 1: Write the proportion equation
   561.03 : 1,211.69 = 1,211.69 : x
2. Step 2: Convert to fraction form
   561.03/1,211.69 = 1,211.69/x
3. Step 3: Cross multiply
   561.03x = 1,211.69 × 1,211.69
4. Step 4: Simplify right side
   561.03x = 1,468,186.60
5. Step 5: Solve for x
   x = 1,468,186.60/561.03
6. Step 6: Final answer
   x = 2,616.94