Finding the Third Proportional to 215,422 and 301,866

Step by Step Solution

1. Step 1: Write the proportion equation
   215,422 : 301,866 = 301,866 : x
2. Step 2: Convert to fraction form
   215,422/301,866 = 301,866/x
3. Step 3: Cross multiply
   215,422x = 301,866 × 301,866
4. Step 4: Simplify right side
   215,422x = 91,123,081,956
5. Step 5: Solve for x
   x = 91,123,081,956/215,422
6. Step 6: Final answer
   x = 422,998.03