Finding the Third Proportional to 335,059.50 and 518,142

Step by Step Solution

1. Step 1: Write the proportion equation
   335,059.50 : 518,142 = 518,142 : x
2. Step 2: Convert to fraction form
   335,059.50/518,142 = 518,142/x
3. Step 3: Cross multiply
   335,059.50x = 518,142 × 518,142
4. Step 4: Simplify right side
   335,059.50x = 268,471,132,164
5. Step 5: Solve for x
   x = 268,471,132,164/335,059.50
6. Step 6: Final answer
   x = 801,264.05