Finding the Third Proportional to 287,294 and 610,900

Step by Step Solution

1. Step 1: Write the proportion equation
   287,294 : 610,900 = 610,900 : x
2. Step 2: Convert to fraction form
   287,294/610,900 = 610,900/x
3. Step 3: Cross multiply
   287,294x = 610,900 × 610,900
4. Step 4: Simplify right side
   287,294x = 373,198,810,000
5. Step 5: Solve for x
   x = 373,198,810,000/287,294
6. Step 6: Final answer
   x = 1,299,013.59