Finding the Third Proportional to 280,866 and 585,056

Step by Step Solution

1. Step 1: Write the proportion equation
   280,866 : 585,056 = 585,056 : x
2. Step 2: Convert to fraction form
   280,866/585,056 = 585,056/x
3. Step 3: Cross multiply
   280,866x = 585,056 × 585,056
4. Step 4: Simplify right side
   280,866x = 342,290,523,136
5. Step 5: Solve for x
   x = 342,290,523,136/280,866
6. Step 6: Final answer
   x = 1,218,696.90