Finding the Third Proportional to 268,248 and 402,404

Step by Step Solution

1. Step 1: Write the proportion equation
   268,248 : 402,404 = 402,404 : x
2. Step 2: Convert to fraction form
   268,248/402,404 = 402,404/x
3. Step 3: Cross multiply
   268,248x = 402,404 × 402,404
4. Step 4: Simplify right side
   268,248x = 161,928,979,216
5. Step 5: Solve for x
   x = 161,928,979,216/268,248
6. Step 6: Final answer
   x = 603,654.00