Finding the Third Proportional to 287,228 and 613,550

Step by Step Solution

1. Step 1: Write the proportion equation
   287,228 : 613,550 = 613,550 : x
2. Step 2: Convert to fraction form
   287,228/613,550 = 613,550/x
3. Step 3: Cross multiply
   287,228x = 613,550 × 613,550
4. Step 4: Simplify right side
   287,228x = 376,443,602,500
5. Step 5: Solve for x
   x = 376,443,602,500/287,228
6. Step 6: Final answer
   x = 1,310,609.00