Finding the Third Proportional to 431,449.50 and 675,342

Step by Step Solution

1. Step 1: Write the proportion equation
   431,449.50 : 675,342 = 675,342 : x
2. Step 2: Convert to fraction form
   431,449.50/675,342 = 675,342/x
3. Step 3: Cross multiply
   431,449.50x = 675,342 × 675,342
4. Step 4: Simplify right side
   431,449.50x = 456,086,816,964
5. Step 5: Solve for x
   x = 456,086,816,964/431,449.50
6. Step 6: Final answer
   x = 1,057,103.59