Finding the Third Proportional to 339,549 and 516,700.50

Step by Step Solution

1. Step 1: Write the proportion equation
   339,549 : 516,700.50 = 516,700.50 : x
2. Step 2: Convert to fraction form
   339,549/516,700.50 = 516,700.50/x
3. Step 3: Cross multiply
   339,549x = 516,700.50 × 516,700.50
4. Step 4: Simplify right side
   339,549x = 266,979,406,700.25
5. Step 5: Solve for x
   x = 266,979,406,700.25/339,549
6. Step 6: Final answer
   x = 786,276.52