Finding the Third Proportional to 549.56 and 1,209.38

Step by Step Solution

1. Step 1: Write the proportion equation
   549.56 : 1,209.38 = 1,209.38 : x
2. Step 2: Convert to fraction form
   549.56/1,209.38 = 1,209.38/x
3. Step 3: Cross multiply
   549.56x = 1,209.38 × 1,209.38
4. Step 4: Simplify right side
   549.56x = 1,462,587.89
5. Step 5: Solve for x
   x = 1,462,587.89/549.56
6. Step 6: Final answer
   x = 2,661.37