Finding the Third Proportional to 507,145 and 789,797.50

Step by Step Solution

1. Step 1: Write the proportion equation
   507,145 : 789,797.50 = 789,797.50 : x
2. Step 2: Convert to fraction form
   507,145/789,797.50 = 789,797.50/x
3. Step 3: Cross multiply
   507,145x = 789,797.50 × 789,797.50
4. Step 4: Simplify right side
   507,145x = 623,780,091,006.25
5. Step 5: Solve for x
   x = 623,780,091,006.25/507,145
6. Step 6: Final answer
   x = 1,229,983.71