Finding the Third Proportional to 400,898 and 870,916

Step by Step Solution

1. Step 1: Write the proportion equation
   400,898 : 870,916 = 870,916 : x
2. Step 2: Convert to fraction form
   400,898/870,916 = 870,916/x
3. Step 3: Cross multiply
   400,898x = 870,916 × 870,916
4. Step 4: Simplify right side
   400,898x = 758,494,679,056
5. Step 5: Solve for x
   x = 758,494,679,056/400,898
6. Step 6: Final answer
   x = 1,891,989.18