Finding the Third Proportional to 225,138 and 480,408

Step by Step Solution

1. Step 1: Write the proportion equation
   225,138 : 480,408 = 480,408 : x
2. Step 2: Convert to fraction form
   225,138/480,408 = 480,408/x
3. Step 3: Cross multiply
   225,138x = 480,408 × 480,408
4. Step 4: Simplify right side
   225,138x = 230,791,846,464
5. Step 5: Solve for x
   x = 230,791,846,464/225,138
6. Step 6: Final answer
   x = 1,025,112.80