Finding the Third Proportional to 428,572 and 904,856

Step by Step Solution

1. Step 1: Write the proportion equation
   428,572 : 904,856 = 904,856 : x
2. Step 2: Convert to fraction form
   428,572/904,856 = 904,856/x
3. Step 3: Cross multiply
   428,572x = 904,856 × 904,856
4. Step 4: Simplify right side
   428,572x = 818,764,380,736
5. Step 5: Solve for x
   x = 818,764,380,736/428,572
6. Step 6: Final answer
   x = 1,910,447.67