Finding the Third Proportional to 187,218 and 281,016

Step by Step Solution

1. Step 1: Write the proportion equation
   187,218 : 281,016 = 281,016 : x
2. Step 2: Convert to fraction form
   187,218/281,016 = 281,016/x
3. Step 3: Cross multiply
   187,218x = 281,016 × 281,016
4. Step 4: Simplify right side
   187,218x = 78,969,992,256
5. Step 5: Solve for x
   x = 78,969,992,256/187,218
6. Step 6: Final answer
   x = 421,807.69