Finding the Third Proportional to 515,283 and 817,708.50

Step by Step Solution

1. Step 1: Write the proportion equation
   515,283 : 817,708.50 = 817,708.50 : x
2. Step 2: Convert to fraction form
   515,283/817,708.50 = 817,708.50/x
3. Step 3: Cross multiply
   515,283x = 817,708.50 × 817,708.50
4. Step 4: Simplify right side
   515,283x = 668,647,190,972.25
5. Step 5: Solve for x
   x = 668,647,190,972.25/515,283
6. Step 6: Final answer
   x = 1,297,630.99