Finding the Third Proportional to 109,218 and 173,663

Step by Step Solution

1. Step 1: Write the proportion equation
   109,218 : 173,663 = 173,663 : x
2. Step 2: Convert to fraction form
   109,218/173,663 = 173,663/x
3. Step 3: Cross multiply
   109,218x = 173,663 × 173,663
4. Step 4: Simplify right side
   109,218x = 30,158,837,569
5. Step 5: Solve for x
   x = 30,158,837,569/109,218
6. Step 6: Final answer
   x = 276,134.31