Finding the Fourth Proportional to 16,716.78, 23,069.61 and 12,009.87

Step by Step Solution

1. Step 1: Write the proportion equation
   16,716.78 : 23,069.61 = 12,009.87 : x
2. Step 2: Convert to fraction form
   16,716.78/23,069.61 = 12,009.87/x
3. Step 3: Cross multiply
   16,716.78x = 23,069.61 × 12,009.87
4. Step 4: Simplify right side
   16,716.78x = 277,063,017.05
5. Step 5: Solve for x
   x = 277,063,017.05/16,716.78
6. Step 6: Final answer
   x = 16,573.95