Finding the Third Proportional to 10,617.75 and 12,021.75

Step by Step Solution

1. Step 1: Write the proportion equation
   10,617.75 : 12,021.75 = 12,021.75 : x
2. Step 2: Convert to fraction form
   10,617.75/12,021.75 = 12,021.75/x
3. Step 3: Cross multiply
   10,617.75x = 12,021.75 × 12,021.75
4. Step 4: Simplify right side
   10,617.75x = 144,522,473.06
5. Step 5: Solve for x
   x = 144,522,473.06/10,617.75
6. Step 6: Final answer
   x = 13,611.40