Finding the Third Proportional to 255,474 and 554,415.75

Step by Step Solution

1. Step 1: Write the proportion equation
   255,474 : 554,415.75 = 554,415.75 : x
2. Step 2: Convert to fraction form
   255,474/554,415.75 = 554,415.75/x
3. Step 3: Cross multiply
   255,474x = 554,415.75 × 554,415.75
4. Step 4: Simplify right side
   255,474x = 307,376,823,848.06
5. Step 5: Solve for x
   x = 307,376,823,848.06/255,474
6. Step 6: Final answer
   x = 1,203,162.84