Finding the Third Proportional to 40,339 and 56,422

Step by Step Solution

1. Step 1: Write the proportion equation
   40,339 : 56,422 = 56,422 : x
2. Step 2: Convert to fraction form
   40,339/56,422 = 56,422/x
3. Step 3: Cross multiply
   40,339x = 56,422 × 56,422
4. Step 4: Simplify right side
   40,339x = 3,183,442,084
5. Step 5: Solve for x
   x = 3,183,442,084/40,339
6. Step 6: Final answer
   x = 78,917.23