Finding the Third Proportional to 561,005 and 1,217,123

Step by Step Solution

1. Step 1: Write the proportion equation
   561,005 : 1,217,123 = 1,217,123 : x
2. Step 2: Convert to fraction form
   561,005/1,217,123 = 1,217,123/x
3. Step 3: Cross multiply
   561,005x = 1,217,123 × 1,217,123
4. Step 4: Simplify right side
   561,005x = 1,481,388,397,129
5. Step 5: Solve for x
   x = 1,481,388,397,129/561,005
6. Step 6: Final answer
   x = 2,640,597.49