Finding the Third Proportional to 386,866.50 and 591,747

Step by Step Solution

1. Step 1: Write the proportion equation
   386,866.50 : 591,747 = 591,747 : x
2. Step 2: Convert to fraction form
   386,866.50/591,747 = 591,747/x
3. Step 3: Cross multiply
   386,866.50x = 591,747 × 591,747
4. Step 4: Simplify right side
   386,866.50x = 350,164,512,009
5. Step 5: Solve for x
   x = 350,164,512,009/386,866.50
6. Step 6: Final answer
   x = 905,130.10