Finding the Third Proportional to 561,480 and 863,906

Step by Step Solution

1. Step 1: Write the proportion equation
   561,480 : 863,906 = 863,906 : x
2. Step 2: Convert to fraction form
   561,480/863,906 = 863,906/x
3. Step 3: Cross multiply
   561,480x = 863,906 × 863,906
4. Step 4: Simplify right side
   561,480x = 746,333,576,836
5. Step 5: Solve for x
   x = 746,333,576,836/561,480
6. Step 6: Final answer
   x = 1,329,225.58