Finding the Third Proportional to 7,872 and 12,017.25

Step by Step Solution

1. Step 1: Write the proportion equation
   7,872 : 12,017.25 = 12,017.25 : x
2. Step 2: Convert to fraction form
   7,872/12,017.25 = 12,017.25/x
3. Step 3: Cross multiply
   7,872x = 12,017.25 × 12,017.25
4. Step 4: Simplify right side
   7,872x = 144,414,297.56
5. Step 5: Solve for x
   x = 144,414,297.56/7,872
6. Step 6: Final answer
   x = 18,345.31