Finding the Third Proportional to 109,510 and 121,030

Step by Step Solution

1. Step 1: Write the proportion equation
   109,510 : 121,030 = 121,030 : x
2. Step 2: Convert to fraction form
   109,510/121,030 = 121,030/x
3. Step 3: Cross multiply
   109,510x = 121,030 × 121,030
4. Step 4: Simplify right side
   109,510x = 14,648,260,900
5. Step 5: Solve for x
   x = 14,648,260,900/109,510
6. Step 6: Final answer
   x = 133,761.86