Finding the Third Proportional to 428,476 and 876,608

Step by Step Solution

1. Step 1: Write the proportion equation
   428,476 : 876,608 = 876,608 : x
2. Step 2: Convert to fraction form
   428,476/876,608 = 876,608/x
3. Step 3: Cross multiply
   428,476x = 876,608 × 876,608
4. Step 4: Simplify right side
   428,476x = 768,441,585,664
5. Step 5: Solve for x
   x = 768,441,585,664/428,476
6. Step 6: Final answer
   x = 1,793,429.70