Finding the Fourth Proportional to 12,017.54, 16,560.57 and 9,188.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,017.54 : 16,560.57 = 9,188.11 : x
2. Step 2: Convert to fraction form
   12,017.54/16,560.57 = 9,188.11/x
3. Step 3: Cross multiply
   12,017.54x = 16,560.57 × 9,188.11
4. Step 4: Simplify right side
   12,017.54x = 152,160,297.42
5. Step 5: Solve for x
   x = 152,160,297.42/12,017.54
6. Step 6: Final answer
   x = 12,661.52