Finding the Third Proportional to 516,717 and 759,766.50

Step by Step Solution

1. Step 1: Write the proportion equation
   516,717 : 759,766.50 = 759,766.50 : x
2. Step 2: Convert to fraction form
   516,717/759,766.50 = 759,766.50/x
3. Step 3: Cross multiply
   516,717x = 759,766.50 × 759,766.50
4. Step 4: Simplify right side
   516,717x = 577,245,134,522.25
5. Step 5: Solve for x
   x = 577,245,134,522.25/516,717
6. Step 6: Final answer
   x = 1,117,139.82