Finding the Third Proportional to 225,188 and 485,320

Step by Step Solution

1. Step 1: Write the proportion equation
   225,188 : 485,320 = 485,320 : x
2. Step 2: Convert to fraction form
   225,188/485,320 = 485,320/x
3. Step 3: Cross multiply
   225,188x = 485,320 × 485,320
4. Step 4: Simplify right side
   225,188x = 235,535,502,400
5. Step 5: Solve for x
   x = 235,535,502,400/225,188
6. Step 6: Final answer
   x = 1,045,950.51