Finding the Third Proportional to 42,792 and 67,220

Step by Step Solution

1. Step 1: Write the proportion equation
   42,792 : 67,220 = 67,220 : x
2. Step 2: Convert to fraction form
   42,792/67,220 = 67,220/x
3. Step 3: Cross multiply
   42,792x = 67,220 × 67,220
4. Step 4: Simplify right side
   42,792x = 4,518,528,400
5. Step 5: Solve for x
   x = 4,518,528,400/42,792
6. Step 6: Final answer
   x = 105,592.83