Finding the Third Proportional to 505,732.50 and 711,405

Step by Step Solution

1. Step 1: Write the proportion equation
   505,732.50 : 711,405 = 711,405 : x
2. Step 2: Convert to fraction form
   505,732.50/711,405 = 711,405/x
3. Step 3: Cross multiply
   505,732.50x = 711,405 × 711,405
4. Step 4: Simplify right side
   505,732.50x = 506,097,074,025
5. Step 5: Solve for x
   x = 506,097,074,025/505,732.50
6. Step 6: Final answer
   x = 1,000,720.88