Finding the Third Proportional to 257,538.75 and 557,979

Step by Step Solution

1. Step 1: Write the proportion equation
   257,538.75 : 557,979 = 557,979 : x
2. Step 2: Convert to fraction form
   257,538.75/557,979 = 557,979/x
3. Step 3: Cross multiply
   257,538.75x = 557,979 × 557,979
4. Step 4: Simplify right side
   257,538.75x = 311,340,564,441
5. Step 5: Solve for x
   x = 311,340,564,441/257,538.75
6. Step 6: Final answer
   x = 1,208,907.65