Finding the Third Proportional to 287,298 and 610,908

Step by Step Solution

1. Step 1: Write the proportion equation
   287,298 : 610,908 = 610,908 : x
2. Step 2: Convert to fraction form
   287,298/610,908 = 610,908/x
3. Step 3: Cross multiply
   287,298x = 610,908 × 610,908
4. Step 4: Simplify right side
   287,298x = 373,208,584,464
5. Step 5: Solve for x
   x = 373,208,584,464/287,298
6. Step 6: Final answer
   x = 1,299,029.52