Finding the Third Proportional to 18,978 and 41,515.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,978 : 41,515.50 = 41,515.50 : x
2. Step 2: Convert to fraction form
   18,978/41,515.50 = 41,515.50/x
3. Step 3: Cross multiply
   18,978x = 41,515.50 × 41,515.50
4. Step 4: Simplify right side
   18,978x = 1,723,536,740.25
5. Step 5: Solve for x
   x = 1,723,536,740.25/18,978
6. Step 6: Final answer
   x = 90,817.62