Finding the Third Proportional to 428,932 and 847,099

Step by Step Solution

1. Step 1: Write the proportion equation
   428,932 : 847,099 = 847,099 : x
2. Step 2: Convert to fraction form
   428,932/847,099 = 847,099/x
3. Step 3: Cross multiply
   428,932x = 847,099 × 847,099
4. Step 4: Simplify right side
   428,932x = 717,576,715,801
5. Step 5: Solve for x
   x = 717,576,715,801/428,932
6. Step 6: Final answer
   x = 1,672,938.17