Finding the Third Proportional to 518,109.50 and 799,304.50

Step by Step Solution

1. Step 1: Write the proportion equation
   518,109.50 : 799,304.50 = 799,304.50 : x
2. Step 2: Convert to fraction form
   518,109.50/799,304.50 = 799,304.50/x
3. Step 3: Cross multiply
   518,109.50x = 799,304.50 × 799,304.50
4. Step 4: Simplify right side
   518,109.50x = 638,887,683,720.25
5. Step 5: Solve for x
   x = 638,887,683,720.25/518,109.50
6. Step 6: Final answer
   x = 1,233,113.24