Finding the Third Proportional to 11,917.69 and 15,814.13

Step by Step Solution

1. Step 1: Write the proportion equation
   11,917.69 : 15,814.13 = 15,814.13 : x
2. Step 2: Convert to fraction form
   11,917.69/15,814.13 = 15,814.13/x
3. Step 3: Cross multiply
   11,917.69x = 15,814.13 × 15,814.13
4. Step 4: Simplify right side
   11,917.69x = 250,086,549.52
5. Step 5: Solve for x
   x = 250,086,549.52/11,917.69
6. Step 6: Final answer
   x = 20,984.49