Finding the Third Proportional to 239,724 and 516,808.50

Step by Step Solution

1. Step 1: Write the proportion equation
   239,724 : 516,808.50 = 516,808.50 : x
2. Step 2: Convert to fraction form
   239,724/516,808.50 = 516,808.50/x
3. Step 3: Cross multiply
   239,724x = 516,808.50 × 516,808.50
4. Step 4: Simplify right side
   239,724x = 267,091,025,672.25
5. Step 5: Solve for x
   x = 267,091,025,672.25/239,724
6. Step 6: Final answer
   x = 1,114,160.56