Finding the Third Proportional to 428,935 and 847,105

Step by Step Solution

1. Step 1: Write the proportion equation
   428,935 : 847,105 = 847,105 : x
2. Step 2: Convert to fraction form
   428,935/847,105 = 847,105/x
3. Step 3: Cross multiply
   428,935x = 847,105 × 847,105
4. Step 4: Simplify right side
   428,935x = 717,586,881,025
5. Step 5: Solve for x
   x = 717,586,881,025/428,935
6. Step 6: Final answer
   x = 1,672,950.17