Finding the Fourth Proportional to 12,388.96, 17,085.36 and 11,494.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.96 : 17,085.36 = 11,494.72 : x
2. Step 2: Convert to fraction form
   12,388.96/17,085.36 = 11,494.72/x
3. Step 3: Cross multiply
   12,388.96x = 17,085.36 × 11,494.72
4. Step 4: Simplify right side
   12,388.96x = 196,391,429.30
5. Step 5: Solve for x
   x = 196,391,429.30/12,388.96
6. Step 6: Final answer
   x = 15,852.13