Finding the Third Proportional to 518,368.50 and 811,412

Step by Step Solution

1. Step 1: Write the proportion equation
   518,368.50 : 811,412 = 811,412 : x
2. Step 2: Convert to fraction form
   518,368.50/811,412 = 811,412/x
3. Step 3: Cross multiply
   518,368.50x = 811,412 × 811,412
4. Step 4: Simplify right side
   518,368.50x = 658,389,433,744
5. Step 5: Solve for x
   x = 658,389,433,744/518,368.50
6. Step 6: Final answer
   x = 1,270,118.52