Finding the Fourth Proportional to 16,788.90, 23,168.22 and 9,131.92

Step by Step Solution

1. Step 1: Write the proportion equation
   16,788.90 : 23,168.22 = 9,131.92 : x
2. Step 2: Convert to fraction form
   16,788.90/23,168.22 = 9,131.92/x
3. Step 3: Cross multiply
   16,788.90x = 23,168.22 × 9,131.92
4. Step 4: Simplify right side
   16,788.90x = 211,570,308.75
5. Step 5: Solve for x
   x = 211,570,308.75/16,788.90
6. Step 6: Final answer
   x = 12,601.80