Finding the Fourth Proportional to 16,863.39, 23,271.45 and 9,411.39

Step by Step Solution

1. Step 1: Write the proportion equation
   16,863.39 : 23,271.45 = 9,411.39 : x
2. Step 2: Convert to fraction form
   16,863.39/23,271.45 = 9,411.39/x
3. Step 3: Cross multiply
   16,863.39x = 23,271.45 × 9,411.39
4. Step 4: Simplify right side
   16,863.39x = 219,016,691.82
5. Step 5: Solve for x
   x = 219,016,691.82/16,863.39
6. Step 6: Final answer
   x = 12,987.70