Finding the Third Proportional to 10,969.17 and 11,789.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,969.17 : 11,789.30 = 11,789.30 : x
2. Step 2: Convert to fraction form
   10,969.17/11,789.30 = 11,789.30/x
3. Step 3: Cross multiply
   10,969.17x = 11,789.30 × 11,789.30
4. Step 4: Simplify right side
   10,969.17x = 138,987,520.81
5. Step 5: Solve for x
   x = 138,987,520.81/10,969.17
6. Step 6: Final answer
   x = 12,670.74