Finding the Third Proportional to 254,368.50 and 404,903

Step by Step Solution

1. Step 1: Write the proportion equation
   254,368.50 : 404,903 = 404,903 : x
2. Step 2: Convert to fraction form
   254,368.50/404,903 = 404,903/x
3. Step 3: Cross multiply
   254,368.50x = 404,903 × 404,903
4. Step 4: Simplify right side
   254,368.50x = 163,946,439,409
5. Step 5: Solve for x
   x = 163,946,439,409/254,368.50
6. Step 6: Final answer
   x = 644,523.36