Finding the Third Proportional to 7,321.50 and 11,751.75

Step by Step Solution

1. Step 1: Write the proportion equation
   7,321.50 : 11,751.75 = 11,751.75 : x
2. Step 2: Convert to fraction form
   7,321.50/11,751.75 = 11,751.75/x
3. Step 3: Cross multiply
   7,321.50x = 11,751.75 × 11,751.75
4. Step 4: Simplify right side
   7,321.50x = 138,103,628.06
5. Step 5: Solve for x
   x = 138,103,628.06/7,321.50
6. Step 6: Final answer
   x = 18,862.75