Finding the Third Proportional to 9,150 and 11,139

Step by Step Solution

1. Step 1: Write the proportion equation
   9,150 : 11,139 = 11,139 : x
2. Step 2: Convert to fraction form
   9,150/11,139 = 11,139/x
3. Step 3: Cross multiply
   9,150x = 11,139 × 11,139
4. Step 4: Simplify right side
   9,150x = 124,077,321
5. Step 5: Solve for x
   x = 124,077,321/9,150
6. Step 6: Final answer
   x = 13,560.36