Finding the Third Proportional to 42,402 and 67,491

Step by Step Solution

1. Step 1: Write the proportion equation
   42,402 : 67,491 = 67,491 : x
2. Step 2: Convert to fraction form
   42,402/67,491 = 67,491/x
3. Step 3: Cross multiply
   42,402x = 67,491 × 67,491
4. Step 4: Simplify right side
   42,402x = 4,555,035,081
5. Step 5: Solve for x
   x = 4,555,035,081/42,402
6. Step 6: Final answer
   x = 107,425.01