Finding the Third Proportional to 621,658.50 and 928,647

Step by Step Solution

1. Step 1: Write the proportion equation
   621,658.50 : 928,647 = 928,647 : x
2. Step 2: Convert to fraction form
   621,658.50/928,647 = 928,647/x
3. Step 3: Cross multiply
   621,658.50x = 928,647 × 928,647
4. Step 4: Simplify right side
   621,658.50x = 862,385,250,609
5. Step 5: Solve for x
   x = 862,385,250,609/621,658.50
6. Step 6: Final answer
   x = 1,387,233.10