Finding the Third Proportional to 42,420 and 62,388

Step by Step Solution

1. Step 1: Write the proportion equation
   42,420 : 62,388 = 62,388 : x
2. Step 2: Convert to fraction form
   42,420/62,388 = 62,388/x
3. Step 3: Cross multiply
   42,420x = 62,388 × 62,388
4. Step 4: Simplify right side
   42,420x = 3,892,262,544
5. Step 5: Solve for x
   x = 3,892,262,544/42,420
6. Step 6: Final answer
   x = 91,755.36