Finding the Third Proportional to 518,118 and 789,711.75

Step by Step Solution

1. Step 1: Write the proportion equation
   518,118 : 789,711.75 = 789,711.75 : x
2. Step 2: Convert to fraction form
   518,118/789,711.75 = 789,711.75/x
3. Step 3: Cross multiply
   518,118x = 789,711.75 × 789,711.75
4. Step 4: Simplify right side
   518,118x = 623,644,648,088.06
5. Step 5: Solve for x
   x = 623,644,648,088.06/518,118
6. Step 6: Final answer
   x = 1,203,673.00