Finding the Third Proportional to 312,930 and 675,745.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,930 : 675,745.50 = 675,745.50 : x
2. Step 2: Convert to fraction form
   312,930/675,745.50 = 675,745.50/x
3. Step 3: Cross multiply
   312,930x = 675,745.50 × 675,745.50
4. Step 4: Simplify right side
   312,930x = 456,631,980,770.25
5. Step 5: Solve for x
   x = 456,631,980,770.25/312,930
6. Step 6: Final answer
   x = 1,459,214.46