Finding the Fourth Proportional to 13,885.04, 19,103.16 and 12,120.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,885.04 : 19,103.16 = 12,120.72 : x
2. Step 2: Convert to fraction form
   13,885.04/19,103.16 = 12,120.72/x
3. Step 3: Cross multiply
   13,885.04x = 19,103.16 × 12,120.72
4. Step 4: Simplify right side
   13,885.04x = 231,544,053.48
5. Step 5: Solve for x
   x = 231,544,053.48/13,885.04
6. Step 6: Final answer
   x = 16,675.79