Finding the Third Proportional to 546,308 and 855,105

Step by Step Solution

1. Step 1: Write the proportion equation
   546,308 : 855,105 = 855,105 : x
2. Step 2: Convert to fraction form
   546,308/855,105 = 855,105/x
3. Step 3: Cross multiply
   546,308x = 855,105 × 855,105
4. Step 4: Simplify right side
   546,308x = 731,204,561,025
5. Step 5: Solve for x
   x = 731,204,561,025/546,308
6. Step 6: Final answer
   x = 1,338,447.47