Finding the Third Proportional to 287,401.50 and 441,146.25

Step by Step Solution

1. Step 1: Write the proportion equation
   287,401.50 : 441,146.25 = 441,146.25 : x
2. Step 2: Convert to fraction form
   287,401.50/441,146.25 = 441,146.25/x
3. Step 3: Cross multiply
   287,401.50x = 441,146.25 × 441,146.25
4. Step 4: Simplify right side
   287,401.50x = 194,610,013,889.06
5. Step 5: Solve for x
   x = 194,610,013,889.06/287,401.50
6. Step 6: Final answer
   x = 677,136.39