Finding the Third Proportional to 254,861 and 404,892

Step by Step Solution

1. Step 1: Write the proportion equation
   254,861 : 404,892 = 404,892 : x
2. Step 2: Convert to fraction form
   254,861/404,892 = 404,892/x
3. Step 3: Cross multiply
   254,861x = 404,892 × 404,892
4. Step 4: Simplify right side
   254,861x = 163,937,531,664
5. Step 5: Solve for x
   x = 163,937,531,664/254,861
6. Step 6: Final answer
   x = 643,242.91