Finding the Third Proportional to 5,551.50 and 12,139.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,551.50 : 12,139.25 = 12,139.25 : x
2. Step 2: Convert to fraction form
   5,551.50/12,139.25 = 12,139.25/x
3. Step 3: Cross multiply
   5,551.50x = 12,139.25 × 12,139.25
4. Step 4: Simplify right side
   5,551.50x = 147,361,390.56
5. Step 5: Solve for x
   x = 147,361,390.56/5,551.50
6. Step 6: Final answer
   x = 26,544.43