Finding the Third Proportional to 42,220 and 89,208

Step by Step Solution

1. Step 1: Write the proportion equation
   42,220 : 89,208 = 89,208 : x
2. Step 2: Convert to fraction form
   42,220/89,208 = 89,208/x
3. Step 3: Cross multiply
   42,220x = 89,208 × 89,208
4. Step 4: Simplify right side
   42,220x = 7,958,067,264
5. Step 5: Solve for x
   x = 7,958,067,264/42,220
6. Step 6: Final answer
   x = 188,490.46