Finding the Third Proportional to 312,945 and 425,104.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,945 : 425,104.50 = 425,104.50 : x
2. Step 2: Convert to fraction form
   312,945/425,104.50 = 425,104.50/x
3. Step 3: Cross multiply
   312,945x = 425,104.50 × 425,104.50
4. Step 4: Simplify right side
   312,945x = 180,713,835,920.25
5. Step 5: Solve for x
   x = 180,713,835,920.25/312,945
6. Step 6: Final answer
   x = 577,461.97