Finding the Third Proportional to 215,328 and 333,408

Step by Step Solution

1. Step 1: Write the proportion equation
   215,328 : 333,408 = 333,408 : x
2. Step 2: Convert to fraction form
   215,328/333,408 = 333,408/x
3. Step 3: Cross multiply
   215,328x = 333,408 × 333,408
4. Step 4: Simplify right side
   215,328x = 111,160,894,464
5. Step 5: Solve for x
   x = 111,160,894,464/215,328
6. Step 6: Final answer
   x = 516,239.85