Finding the Third Proportional to 279,168 and 610,488

Step by Step Solution

1. Step 1: Write the proportion equation
   279,168 : 610,488 = 610,488 : x
2. Step 2: Convert to fraction form
   279,168/610,488 = 610,488/x
3. Step 3: Cross multiply
   279,168x = 610,488 × 610,488
4. Step 4: Simplify right side
   279,168x = 372,695,598,144
5. Step 5: Solve for x
   x = 372,695,598,144/279,168
6. Step 6: Final answer
   x = 1,335,022.63