Finding the Third Proportional to 12,139 and 17,047

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139 : 17,047 = 17,047 : x
2. Step 2: Convert to fraction form
   12,139/17,047 = 17,047/x
3. Step 3: Cross multiply
   12,139x = 17,047 × 17,047
4. Step 4: Simplify right side
   12,139x = 290,600,209
5. Step 5: Solve for x
   x = 290,600,209/12,139
6. Step 6: Final answer
   x = 23,939.39