Finding the Third Proportional to 18,665.25 and 40,299.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,665.25 : 40,299.50 = 40,299.50 : x
2. Step 2: Convert to fraction form
   18,665.25/40,299.50 = 40,299.50/x
3. Step 3: Cross multiply
   18,665.25x = 40,299.50 × 40,299.50
4. Step 4: Simplify right side
   18,665.25x = 1,624,049,700.25
5. Step 5: Solve for x
   x = 1,624,049,700.25/18,665.25
6. Step 6: Final answer
   x = 87,009.27