Finding the Third Proportional to 42,760 and 67,172

Step by Step Solution

1. Step 1: Write the proportion equation
   42,760 : 67,172 = 67,172 : x
2. Step 2: Convert to fraction form
   42,760/67,172 = 67,172/x
3. Step 3: Cross multiply
   42,760x = 67,172 × 67,172
4. Step 4: Simplify right side
   42,760x = 4,512,077,584
5. Step 5: Solve for x
   x = 4,512,077,584/42,760
6. Step 6: Final answer
   x = 105,520.99