Finding the Third Proportional to 12,405.75 and 18,611.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,405.75 : 18,611.25 = 18,611.25 : x
2. Step 2: Convert to fraction form
   12,405.75/18,611.25 = 18,611.25/x
3. Step 3: Cross multiply
   12,405.75x = 18,611.25 × 18,611.25
4. Step 4: Simplify right side
   12,405.75x = 346,378,626.56
5. Step 5: Solve for x
   x = 346,378,626.56/12,405.75
6. Step 6: Final answer
   x = 27,920.81