Finding the Third Proportional to 442,123 and 900,505

Step by Step Solution

1. Step 1: Write the proportion equation
   442,123 : 900,505 = 900,505 : x
2. Step 2: Convert to fraction form
   442,123/900,505 = 900,505/x
3. Step 3: Cross multiply
   442,123x = 900,505 × 900,505
4. Step 4: Simplify right side
   442,123x = 810,909,255,025
5. Step 5: Solve for x
   x = 810,909,255,025/442,123
6. Step 6: Final answer
   x = 1,834,125.92