Finding the Third Proportional to 42,264 and 66,912

Step by Step Solution

1. Step 1: Write the proportion equation
   42,264 : 66,912 = 66,912 : x
2. Step 2: Convert to fraction form
   42,264/66,912 = 66,912/x
3. Step 3: Cross multiply
   42,264x = 66,912 × 66,912
4. Step 4: Simplify right side
   42,264x = 4,477,215,744
5. Step 5: Solve for x
   x = 4,477,215,744/42,264
6. Step 6: Final answer
   x = 105,934.50