Finding the Third Proportional to 111,422 and 168,078

Step by Step Solution

1. Step 1: Write the proportion equation
   111,422 : 168,078 = 168,078 : x
2. Step 2: Convert to fraction form
   111,422/168,078 = 168,078/x
3. Step 3: Cross multiply
   111,422x = 168,078 × 168,078
4. Step 4: Simplify right side
   111,422x = 28,250,214,084
5. Step 5: Solve for x
   x = 28,250,214,084/111,422
6. Step 6: Final answer
   x = 253,542.51