Finding the Third Proportional to 136,441 and 279,644

Step by Step Solution

1. Step 1: Write the proportion equation
   136,441 : 279,644 = 279,644 : x
2. Step 2: Convert to fraction form
   136,441/279,644 = 279,644/x
3. Step 3: Cross multiply
   136,441x = 279,644 × 279,644
4. Step 4: Simplify right side
   136,441x = 78,200,766,736
5. Step 5: Solve for x
   x = 78,200,766,736/136,441
6. Step 6: Final answer
   x = 573,147.12