Finding the Third Proportional to 191,238 and 415,644

Step by Step Solution

1. Step 1: Write the proportion equation
   191,238 : 415,644 = 415,644 : x
2. Step 2: Convert to fraction form
   191,238/415,644 = 415,644/x
3. Step 3: Cross multiply
   191,238x = 415,644 × 415,644
4. Step 4: Simplify right side
   191,238x = 172,759,934,736
5. Step 5: Solve for x
   x = 172,759,934,736/191,238
6. Step 6: Final answer
   x = 903,376.60