Finding the Third Proportional to 221,173 and 333,591

Step by Step Solution

1. Step 1: Write the proportion equation
   221,173 : 333,591 = 333,591 : x
2. Step 2: Convert to fraction form
   221,173/333,591 = 333,591/x
3. Step 3: Cross multiply
   221,173x = 333,591 × 333,591
4. Step 4: Simplify right side
   221,173x = 111,282,955,281
5. Step 5: Solve for x
   x = 111,282,955,281/221,173
6. Step 6: Final answer
   x = 503,148.92