Finding the Third Proportional to 12,339 and 18,090

Step by Step Solution

1. Step 1: Write the proportion equation
   12,339 : 18,090 = 18,090 : x
2. Step 2: Convert to fraction form
   12,339/18,090 = 18,090/x
3. Step 3: Cross multiply
   12,339x = 18,090 × 18,090
4. Step 4: Simplify right side
   12,339x = 327,248,100
5. Step 5: Solve for x
   x = 327,248,100/12,339
6. Step 6: Final answer
   x = 26,521.44