Finding the Third Proportional to 561,280 and 855,928

Step by Step Solution

1. Step 1: Write the proportion equation
   561,280 : 855,928 = 855,928 : x
2. Step 2: Convert to fraction form
   561,280/855,928 = 855,928/x
3. Step 3: Cross multiply
   561,280x = 855,928 × 855,928
4. Step 4: Simplify right side
   561,280x = 732,612,741,184
5. Step 5: Solve for x
   x = 732,612,741,184/561,280
6. Step 6: Final answer
   x = 1,305,253.60