Finding the Third Proportional to 239,905 and 516,715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   239,905 : 516,715.50 = 516,715.50 : x
2. Step 2: Convert to fraction form
   239,905/516,715.50 = 516,715.50/x
3. Step 3: Cross multiply
   239,905x = 516,715.50 × 516,715.50
4. Step 4: Simplify right side
   239,905x = 266,994,907,940.25
5. Step 5: Solve for x
   x = 266,994,907,940.25/239,905
6. Step 6: Final answer
   x = 1,112,919.31