Finding the Fourth Proportional to 16,005.36, 22,087.88 and 8,931.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,005.36 : 22,087.88 = 8,931.60 : x
2. Step 2: Convert to fraction form
   16,005.36/22,087.88 = 8,931.60/x
3. Step 3: Cross multiply
   16,005.36x = 22,087.88 × 8,931.60
4. Step 4: Simplify right side
   16,005.36x = 197,280,109.01
5. Step 5: Solve for x
   x = 197,280,109.01/16,005.36
6. Step 6: Final answer
   x = 12,325.88