Finding the Third Proportional to 216,768 and 333,445

Step by Step Solution

1. Step 1: Write the proportion equation
   216,768 : 333,445 = 333,445 : x
2. Step 2: Convert to fraction form
   216,768/333,445 = 333,445/x
3. Step 3: Cross multiply
   216,768x = 333,445 × 333,445
4. Step 4: Simplify right side
   216,768x = 111,185,568,025
5. Step 5: Solve for x
   x = 111,185,568,025/216,768
6. Step 6: Final answer
   x = 512,924.27