Finding the Third Proportional to 258,938 and 401,848

Step by Step Solution

1. Step 1: Write the proportion equation
   258,938 : 401,848 = 401,848 : x
2. Step 2: Convert to fraction form
   258,938/401,848 = 401,848/x
3. Step 3: Cross multiply
   258,938x = 401,848 × 401,848
4. Step 4: Simplify right side
   258,938x = 161,481,815,104
5. Step 5: Solve for x
   x = 161,481,815,104/258,938
6. Step 6: Final answer
   x = 623,631.20