Finding the Third Proportional to 254,374.50 and 404,912

Step by Step Solution

1. Step 1: Write the proportion equation
   254,374.50 : 404,912 = 404,912 : x
2. Step 2: Convert to fraction form
   254,374.50/404,912 = 404,912/x
3. Step 3: Cross multiply
   254,374.50x = 404,912 × 404,912
4. Step 4: Simplify right side
   254,374.50x = 163,953,727,744
5. Step 5: Solve for x
   x = 163,953,727,744/254,374.50
6. Step 6: Final answer
   x = 644,536.81