Finding the Third Proportional to 518,112 and 799,314.50

Step by Step Solution

1. Step 1: Write the proportion equation
   518,112 : 799,314.50 = 799,314.50 : x
2. Step 2: Convert to fraction form
   518,112/799,314.50 = 799,314.50/x
3. Step 3: Cross multiply
   518,112x = 799,314.50 × 799,314.50
4. Step 4: Simplify right side
   518,112x = 638,903,669,910.25
5. Step 5: Solve for x
   x = 638,903,669,910.25/518,112
6. Step 6: Final answer
   x = 1,233,138.14