Finding the Third Proportional to 357,478 and 500,008

Step by Step Solution

1. Step 1: Write the proportion equation
   357,478 : 500,008 = 500,008 : x
2. Step 2: Convert to fraction form
   357,478/500,008 = 500,008/x
3. Step 3: Cross multiply
   357,478x = 500,008 × 500,008
4. Step 4: Simplify right side
   357,478x = 250,008,000,064
5. Step 5: Solve for x
   x = 250,008,000,064/357,478
6. Step 6: Final answer
   x = 699,366.12