Finding the Third Proportional to 11,820 and 18,290

Step by Step Solution

1. Step 1: Write the proportion equation
   11,820 : 18,290 = 18,290 : x
2. Step 2: Convert to fraction form
   11,820/18,290 = 18,290/x
3. Step 3: Cross multiply
   11,820x = 18,290 × 18,290
4. Step 4: Simplify right side
   11,820x = 334,524,100
5. Step 5: Solve for x
   x = 334,524,100/11,820
6. Step 6: Final answer
   x = 28,301.53