Finding the Third Proportional to 612,414 and 800,518.50

Step by Step Solution

1. Step 1: Write the proportion equation
   612,414 : 800,518.50 = 800,518.50 : x
2. Step 2: Convert to fraction form
   612,414/800,518.50 = 800,518.50/x
3. Step 3: Cross multiply
   612,414x = 800,518.50 × 800,518.50
4. Step 4: Simplify right side
   612,414x = 640,829,868,842.25
5. Step 5: Solve for x
   x = 640,829,868,842.25/612,414
6. Step 6: Final answer
   x = 1,046,399.77