Finding the Third Proportional to 311,901 and 679,771.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,901 : 679,771.50 = 679,771.50 : x
2. Step 2: Convert to fraction form
   311,901/679,771.50 = 679,771.50/x
3. Step 3: Cross multiply
   311,901x = 679,771.50 × 679,771.50
4. Step 4: Simplify right side
   311,901x = 462,089,292,212.25
5. Step 5: Solve for x
   x = 462,089,292,212.25/311,901
6. Step 6: Final answer
   x = 1,481,525.52