Finding the Third Proportional to 507,146 and 789,800

Step by Step Solution

1. Step 1: Write the proportion equation
   507,146 : 789,800 = 789,800 : x
2. Step 2: Convert to fraction form
   507,146/789,800 = 789,800/x
3. Step 3: Cross multiply
   507,146x = 789,800 × 789,800
4. Step 4: Simplify right side
   507,146x = 623,784,040,000
5. Step 5: Solve for x
   x = 623,784,040,000/507,146
6. Step 6: Final answer
   x = 1,229,989.08