Finding the Third Proportional to 289,771.50 and 443,264.25

Step by Step Solution

1. Step 1: Write the proportion equation
   289,771.50 : 443,264.25 = 443,264.25 : x
2. Step 2: Convert to fraction form
   289,771.50/443,264.25 = 443,264.25/x
3. Step 3: Cross multiply
   289,771.50x = 443,264.25 × 443,264.25
4. Step 4: Simplify right side
   289,771.50x = 196,483,195,328.06
5. Step 5: Solve for x
   x = 196,483,195,328.06/289,771.50
6. Step 6: Final answer
   x = 678,062.53