Finding the Third Proportional to 109,178 and 140,439

Step by Step Solution

1. Step 1: Write the proportion equation
   109,178 : 140,439 = 140,439 : x
2. Step 2: Convert to fraction form
   109,178/140,439 = 140,439/x
3. Step 3: Cross multiply
   109,178x = 140,439 × 140,439
4. Step 4: Simplify right side
   109,178x = 19,723,112,721
5. Step 5: Solve for x
   x = 19,723,112,721/109,178
6. Step 6: Final answer
   x = 180,650.98