Finding the Third Proportional to 289,762.50 and 443,253

Step by Step Solution

1. Step 1: Write the proportion equation
   289,762.50 : 443,253 = 443,253 : x
2. Step 2: Convert to fraction form
   289,762.50/443,253 = 443,253/x
3. Step 3: Cross multiply
   289,762.50x = 443,253 × 443,253
4. Step 4: Simplify right side
   289,762.50x = 196,473,222,009
5. Step 5: Solve for x
   x = 196,473,222,009/289,762.50
6. Step 6: Final answer
   x = 678,049.17