Finding the Third Proportional to 339,534 and 719,542.50

Step by Step Solution

1. Step 1: Write the proportion equation
   339,534 : 719,542.50 = 719,542.50 : x
2. Step 2: Convert to fraction form
   339,534/719,542.50 = 719,542.50/x
3. Step 3: Cross multiply
   339,534x = 719,542.50 × 719,542.50
4. Step 4: Simplify right side
   339,534x = 517,741,409,306.25
5. Step 5: Solve for x
   x = 517,741,409,306.25/339,534
6. Step 6: Final answer
   x = 1,524,858.80