Finding the Third Proportional to 254,374.50 and 404,911

Step by Step Solution

1. Step 1: Write the proportion equation
   254,374.50 : 404,911 = 404,911 : x
2. Step 2: Convert to fraction form
   254,374.50/404,911 = 404,911/x
3. Step 3: Cross multiply
   254,374.50x = 404,911 × 404,911
4. Step 4: Simplify right side
   254,374.50x = 163,952,917,921
5. Step 5: Solve for x
   x = 163,952,917,921/254,374.50
6. Step 6: Final answer
   x = 644,533.62