Finding the Third Proportional to 513,081 and 789,304.50

Step by Step Solution

1. Step 1: Write the proportion equation
   513,081 : 789,304.50 = 789,304.50 : x
2. Step 2: Convert to fraction form
   513,081/789,304.50 = 789,304.50/x
3. Step 3: Cross multiply
   513,081x = 789,304.50 × 789,304.50
4. Step 4: Simplify right side
   513,081x = 623,001,593,720.25
5. Step 5: Solve for x
   x = 623,001,593,720.25/513,081
6. Step 6: Final answer
   x = 1,214,236.34