Finding the Third Proportional to 11,090 and 18,478

Step by Step Solution

1. Step 1: Write the proportion equation
   11,090 : 18,478 = 18,478 : x
2. Step 2: Convert to fraction form
   11,090/18,478 = 18,478/x
3. Step 3: Cross multiply
   11,090x = 18,478 × 18,478
4. Step 4: Simplify right side
   11,090x = 341,436,484
5. Step 5: Solve for x
   x = 341,436,484/11,090
6. Step 6: Final answer
   x = 30,787.78