Finding the Fourth Proportional to 12,860.82, 17,753.04 and 8,388.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,860.82 : 17,753.04 = 8,388.42 : x
2. Step 2: Convert to fraction form
   12,860.82/17,753.04 = 8,388.42/x
3. Step 3: Cross multiply
   12,860.82x = 17,753.04 × 8,388.42
4. Step 4: Simplify right side
   12,860.82x = 148,919,955.80
5. Step 5: Solve for x
   x = 148,919,955.80/12,860.82
6. Step 6: Final answer
   x = 11,579.35