Finding the Third Proportional to 388,046.50 and 579,687

Step by Step Solution

1. Step 1: Write the proportion equation
   388,046.50 : 579,687 = 579,687 : x
2. Step 2: Convert to fraction form
   388,046.50/579,687 = 579,687/x
3. Step 3: Cross multiply
   388,046.50x = 579,687 × 579,687
4. Step 4: Simplify right side
   388,046.50x = 336,037,017,969
5. Step 5: Solve for x
   x = 336,037,017,969/388,046.50
6. Step 6: Final answer
   x = 865,971.01