Finding the Third Proportional to 342,717 and 512,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   342,717 : 512,059.50 = 512,059.50 : x
2. Step 2: Convert to fraction form
   342,717/512,059.50 = 512,059.50/x
3. Step 3: Cross multiply
   342,717x = 512,059.50 × 512,059.50
4. Step 4: Simplify right side
   342,717x = 262,204,931,540.25
5. Step 5: Solve for x
   x = 262,204,931,540.25/342,717
6. Step 6: Final answer
   x = 765,077.11