Finding the Third Proportional to 356,143.50 and 758,619

Step by Step Solution

1. Step 1: Write the proportion equation
   356,143.50 : 758,619 = 758,619 : x
2. Step 2: Convert to fraction form
   356,143.50/758,619 = 758,619/x
3. Step 3: Cross multiply
   356,143.50x = 758,619 × 758,619
4. Step 4: Simplify right side
   356,143.50x = 575,502,787,161
5. Step 5: Solve for x
   x = 575,502,787,161/356,143.50
6. Step 6: Final answer
   x = 1,615,929.50