Finding the Third Proportional to 40,328 and 56,408

Step by Step Solution

1. Step 1: Write the proportion equation
   40,328 : 56,408 = 56,408 : x
2. Step 2: Convert to fraction form
   40,328/56,408 = 56,408/x
3. Step 3: Cross multiply
   40,328x = 56,408 × 56,408
4. Step 4: Simplify right side
   40,328x = 3,181,862,464
5. Step 5: Solve for x
   x = 3,181,862,464/40,328
6. Step 6: Final answer
   x = 78,899.59