Finding the Third Proportional to 213,240 and 456,005

Step by Step Solution

1. Step 1: Write the proportion equation
   213,240 : 456,005 = 456,005 : x
2. Step 2: Convert to fraction form
   213,240/456,005 = 456,005/x
3. Step 3: Cross multiply
   213,240x = 456,005 × 456,005
4. Step 4: Simplify right side
   213,240x = 207,940,560,025
5. Step 5: Solve for x
   x = 207,940,560,025/213,240
6. Step 6: Final answer
   x = 975,148.00