Finding the Third Proportional to 40,800 and 54,915

Step by Step Solution

1. Step 1: Write the proportion equation
   40,800 : 54,915 = 54,915 : x
2. Step 2: Convert to fraction form
   40,800/54,915 = 54,915/x
3. Step 3: Cross multiply
   40,800x = 54,915 × 54,915
4. Step 4: Simplify right side
   40,800x = 3,015,657,225
5. Step 5: Solve for x
   x = 3,015,657,225/40,800
6. Step 6: Final answer
   x = 73,913.17