Finding the Third Proportional to 384,267 and 617,398.50

Step by Step Solution

1. Step 1: Write the proportion equation
   384,267 : 617,398.50 = 617,398.50 : x
2. Step 2: Convert to fraction form
   384,267/617,398.50 = 617,398.50/x
3. Step 3: Cross multiply
   384,267x = 617,398.50 × 617,398.50
4. Step 4: Simplify right side
   384,267x = 381,180,907,802.25
5. Step 5: Solve for x
   x = 381,180,907,802.25/384,267
6. Step 6: Final answer
   x = 991,968.89