Finding the Third Proportional to 42,402 and 67,131

Step by Step Solution

1. Step 1: Write the proportion equation
   42,402 : 67,131 = 67,131 : x
2. Step 2: Convert to fraction form
   42,402/67,131 = 67,131/x
3. Step 3: Cross multiply
   42,402x = 67,131 × 67,131
4. Step 4: Simplify right side
   42,402x = 4,506,571,161
5. Step 5: Solve for x
   x = 4,506,571,161/42,402
6. Step 6: Final answer
   x = 106,282.04