Finding the Third Proportional to 42,320 and 80,800

Step by Step Solution

1. Step 1: Write the proportion equation
   42,320 : 80,800 = 80,800 : x
2. Step 2: Convert to fraction form
   42,320/80,800 = 80,800/x
3. Step 3: Cross multiply
   42,320x = 80,800 × 80,800
4. Step 4: Simplify right side
   42,320x = 6,528,640,000
5. Step 5: Solve for x
   x = 6,528,640,000/42,320
6. Step 6: Final answer
   x = 154,268.43