Finding the Third Proportional to 11,821.50 and 18,501.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,821.50 : 18,501.75 = 18,501.75 : x
2. Step 2: Convert to fraction form
   11,821.50/18,501.75 = 18,501.75/x
3. Step 3: Cross multiply
   11,821.50x = 18,501.75 × 18,501.75
4. Step 4: Simplify right side
   11,821.50x = 342,314,753.06
5. Step 5: Solve for x
   x = 342,314,753.06/11,821.50
6. Step 6: Final answer
   x = 28,956.96