Finding the Third Proportional to 8,674.78 and 18,665.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,674.78 : 18,665.53 = 18,665.53 : x
2. Step 2: Convert to fraction form
   8,674.78/18,665.53 = 18,665.53/x
3. Step 3: Cross multiply
   8,674.78x = 18,665.53 × 18,665.53
4. Step 4: Simplify right side
   8,674.78x = 348,402,056.84
5. Step 5: Solve for x
   x = 348,402,056.84/8,674.78
6. Step 6: Final answer
   x = 40,162.63