Finding the Third Proportional to 172,814 and 357,618

Step by Step Solution

1. Step 1: Write the proportion equation
   172,814 : 357,618 = 357,618 : x
2. Step 2: Convert to fraction form
   172,814/357,618 = 357,618/x
3. Step 3: Cross multiply
   172,814x = 357,618 × 357,618
4. Step 4: Simplify right side
   172,814x = 127,890,633,924
5. Step 5: Solve for x
   x = 127,890,633,924/172,814
6. Step 6: Final answer
   x = 740,047.88