Finding the Third Proportional to 285,280 and 441,500.25

Step by Step Solution

1. Step 1: Write the proportion equation
   285,280 : 441,500.25 = 441,500.25 : x
2. Step 2: Convert to fraction form
   285,280/441,500.25 = 441,500.25/x
3. Step 3: Cross multiply
   285,280x = 441,500.25 × 441,500.25
4. Step 4: Simplify right side
   285,280x = 194,922,470,750.06
5. Step 5: Solve for x
   x = 194,922,470,750.06/285,280
6. Step 6: Final answer
   x = 683,267.21