Finding the Third Proportional to 311,577 and 670,537.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,577 : 670,537.50 = 670,537.50 : x
2. Step 2: Convert to fraction form
   311,577/670,537.50 = 670,537.50/x
3. Step 3: Cross multiply
   311,577x = 670,537.50 × 670,537.50
4. Step 4: Simplify right side
   311,577x = 449,620,538,906.25
5. Step 5: Solve for x
   x = 449,620,538,906.25/311,577
6. Step 6: Final answer
   x = 1,443,047.91