Finding the Third Proportional to 518,005 and 800,015.50

Step by Step Solution

1. Step 1: Write the proportion equation
   518,005 : 800,015.50 = 800,015.50 : x
2. Step 2: Convert to fraction form
   518,005/800,015.50 = 800,015.50/x
3. Step 3: Cross multiply
   518,005x = 800,015.50 × 800,015.50
4. Step 4: Simplify right side
   518,005x = 640,024,800,240.25
5. Step 5: Solve for x
   x = 640,024,800,240.25/518,005
6. Step 6: Final answer
   x = 1,235,557.19