Finding the Third Proportional to 384,202.50 and 617,310

Step by Step Solution

1. Step 1: Write the proportion equation
   384,202.50 : 617,310 = 617,310 : x
2. Step 2: Convert to fraction form
   384,202.50/617,310 = 617,310/x
3. Step 3: Cross multiply
   384,202.50x = 617,310 × 617,310
4. Step 4: Simplify right side
   384,202.50x = 381,071,636,100
5. Step 5: Solve for x
   x = 381,071,636,100/384,202.50
6. Step 6: Final answer
   x = 991,851.01