Finding the Third Proportional to 213,048 and 331,200

Step by Step Solution

1. Step 1: Write the proportion equation
   213,048 : 331,200 = 331,200 : x
2. Step 2: Convert to fraction form
   213,048/331,200 = 331,200/x
3. Step 3: Cross multiply
   213,048x = 331,200 × 331,200
4. Step 4: Simplify right side
   213,048x = 109,693,440,000
5. Step 5: Solve for x
   x = 109,693,440,000/213,048
6. Step 6: Final answer
   x = 514,876.65