Finding the Third Proportional to 249,318 and 513,337.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,318 : 513,337.50 = 513,337.50 : x
2. Step 2: Convert to fraction form
   249,318/513,337.50 = 513,337.50/x
3. Step 3: Cross multiply
   249,318x = 513,337.50 × 513,337.50
4. Step 4: Simplify right side
   249,318x = 263,515,388,906.25
5. Step 5: Solve for x
   x = 263,515,388,906.25/249,318
6. Step 6: Final answer
   x = 1,056,944.90