Finding the Third Proportional to 12,120.75 and 18,488.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,120.75 : 18,488.25 = 18,488.25 : x
2. Step 2: Convert to fraction form
   12,120.75/18,488.25 = 18,488.25/x
3. Step 3: Cross multiply
   12,120.75x = 18,488.25 × 18,488.25
4. Step 4: Simplify right side
   12,120.75x = 341,815,388.06
5. Step 5: Solve for x
   x = 341,815,388.06/12,120.75
6. Step 6: Final answer
   x = 28,200.84