Finding the Third Proportional to 25,760 and 56,440

Step by Step Solution

1. Step 1: Write the proportion equation
   25,760 : 56,440 = 56,440 : x
2. Step 2: Convert to fraction form
   25,760/56,440 = 56,440/x
3. Step 3: Cross multiply
   25,760x = 56,440 × 56,440
4. Step 4: Simplify right side
   25,760x = 3,185,473,600
5. Step 5: Solve for x
   x = 3,185,473,600/25,760
6. Step 6: Final answer
   x = 123,659.69