Finding the Third Proportional to 397,166.50 and 864,221

Step by Step Solution

1. Step 1: Write the proportion equation
   397,166.50 : 864,221 = 864,221 : x
2. Step 2: Convert to fraction form
   397,166.50/864,221 = 864,221/x
3. Step 3: Cross multiply
   397,166.50x = 864,221 × 864,221
4. Step 4: Simplify right side
   397,166.50x = 746,877,936,841
5. Step 5: Solve for x
   x = 746,877,936,841/397,166.50
6. Step 6: Final answer
   x = 1,880,515.95