Finding the Fourth Proportional to 11,648.21, 17,478.59 and 10,811.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,648.21 : 17,478.59 = 10,811.48 : x
2. Step 2: Convert to fraction form
   11,648.21/17,478.59 = 10,811.48/x
3. Step 3: Cross multiply
   11,648.21x = 17,478.59 × 10,811.48
4. Step 4: Simplify right side
   11,648.21x = 188,969,284.76
5. Step 5: Solve for x
   x = 188,969,284.76/11,648.21
6. Step 6: Final answer
   x = 16,223.04