Finding the Third Proportional to 353,539.50 and 763,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   353,539.50 : 763,099.50 = 763,099.50 : x
2. Step 2: Convert to fraction form
   353,539.50/763,099.50 = 763,099.50/x
3. Step 3: Cross multiply
   353,539.50x = 763,099.50 × 763,099.50
4. Step 4: Simplify right side
   353,539.50x = 582,320,846,900.25
5. Step 5: Solve for x
   x = 582,320,846,900.25/353,539.50
6. Step 6: Final answer
   x = 1,647,116.79