Finding the Third Proportional to 388,406.25 and 847,413

Step by Step Solution

1. Step 1: Write the proportion equation
   388,406.25 : 847,413 = 847,413 : x
2. Step 2: Convert to fraction form
   388,406.25/847,413 = 847,413/x
3. Step 3: Cross multiply
   388,406.25x = 847,413 × 847,413
4. Step 4: Simplify right side
   388,406.25x = 718,108,792,569
5. Step 5: Solve for x
   x = 718,108,792,569/388,406.25
6. Step 6: Final answer
   x = 1,848,860.03