Finding the Fourth Proportional to 16,671.91, 23,015.59 and 12,886.52

Step by Step Solution

1. Step 1: Write the proportion equation
   16,671.91 : 23,015.59 = 12,886.52 : x
2. Step 2: Convert to fraction form
   16,671.91/23,015.59 = 12,886.52/x
3. Step 3: Cross multiply
   16,671.91x = 23,015.59 × 12,886.52
4. Step 4: Simplify right side
   16,671.91x = 296,590,860.85
5. Step 5: Solve for x
   x = 296,590,860.85/16,671.91
6. Step 6: Final answer
   x = 17,789.85