Finding the Third Proportional to 11,686.78 and 17,085.94

Step by Step Solution

1. Step 1: Write the proportion equation
   11,686.78 : 17,085.94 = 17,085.94 : x
2. Step 2: Convert to fraction form
   11,686.78/17,085.94 = 17,085.94/x
3. Step 3: Cross multiply
   11,686.78x = 17,085.94 × 17,085.94
4. Step 4: Simplify right side
   11,686.78x = 291,929,260.25
5. Step 5: Solve for x
   x = 291,929,260.25/11,686.78
6. Step 6: Final answer
   x = 24,979.44