Finding the Third Proportional to 518,494 and 799,850

Step by Step Solution

1. Step 1: Write the proportion equation
   518,494 : 799,850 = 799,850 : x
2. Step 2: Convert to fraction form
   518,494/799,850 = 799,850/x
3. Step 3: Cross multiply
   518,494x = 799,850 × 799,850
4. Step 4: Simplify right side
   518,494x = 639,760,022,500
5. Step 5: Solve for x
   x = 639,760,022,500/518,494
6. Step 6: Final answer
   x = 1,233,881.25