Finding the Third Proportional to 248,505 and 331,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   248,505 : 331,090.50 = 331,090.50 : x
2. Step 2: Convert to fraction form
   248,505/331,090.50 = 331,090.50/x
3. Step 3: Cross multiply
   248,505x = 331,090.50 × 331,090.50
4. Step 4: Simplify right side
   248,505x = 109,620,919,190.25
5. Step 5: Solve for x
   x = 109,620,919,190.25/248,505
6. Step 6: Final answer
   x = 441,121.58