Finding the Third Proportional to 312,067.50 and 456,993

Step by Step Solution

1. Step 1: Write the proportion equation
   312,067.50 : 456,993 = 456,993 : x
2. Step 2: Convert to fraction form
   312,067.50/456,993 = 456,993/x
3. Step 3: Cross multiply
   312,067.50x = 456,993 × 456,993
4. Step 4: Simplify right side
   312,067.50x = 208,842,602,049
5. Step 5: Solve for x
   x = 208,842,602,049/312,067.50
6. Step 6: Final answer
   x = 669,222.53