Finding the Third Proportional to 9,288 and 14,139

Step by Step Solution

1. Step 1: Write the proportion equation
   9,288 : 14,139 = 14,139 : x
2. Step 2: Convert to fraction form
   9,288/14,139 = 14,139/x
3. Step 3: Cross multiply
   9,288x = 14,139 × 14,139
4. Step 4: Simplify right side
   9,288x = 199,911,321
5. Step 5: Solve for x
   x = 199,911,321/9,288
6. Step 6: Final answer
   x = 21,523.61