Finding the Third Proportional to 356,575.50 and 485,655

Step by Step Solution

1. Step 1: Write the proportion equation
   356,575.50 : 485,655 = 485,655 : x
2. Step 2: Convert to fraction form
   356,575.50/485,655 = 485,655/x
3. Step 3: Cross multiply
   356,575.50x = 485,655 × 485,655
4. Step 4: Simplify right side
   356,575.50x = 235,860,779,025
5. Step 5: Solve for x
   x = 235,860,779,025/356,575.50
6. Step 6: Final answer
   x = 661,460.98