Finding the Third Proportional to 42,176 and 67,209

Step by Step Solution

1. Step 1: Write the proportion equation
   42,176 : 67,209 = 67,209 : x
2. Step 2: Convert to fraction form
   42,176/67,209 = 67,209/x
3. Step 3: Cross multiply
   42,176x = 67,209 × 67,209
4. Step 4: Simplify right side
   42,176x = 4,517,049,681
5. Step 5: Solve for x
   x = 4,517,049,681/42,176
6. Step 6: Final answer
   x = 107,100.00