Finding the Third Proportional to 431,458 and 675,355.50

Step by Step Solution

1. Step 1: Write the proportion equation
   431,458 : 675,355.50 = 675,355.50 : x
2. Step 2: Convert to fraction form
   431,458/675,355.50 = 675,355.50/x
3. Step 3: Cross multiply
   431,458x = 675,355.50 × 675,355.50
4. Step 4: Simplify right side
   431,458x = 456,105,051,380.25
5. Step 5: Solve for x
   x = 456,105,051,380.25/431,458
6. Step 6: Final answer
   x = 1,057,125.03