Finding the Fourth Proportional to 16,111.40, 24,128.70 and 9,890.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,111.40 : 24,128.70 = 9,890.60 : x
2. Step 2: Convert to fraction form
   16,111.40/24,128.70 = 9,890.60/x
3. Step 3: Cross multiply
   16,111.40x = 24,128.70 × 9,890.60
4. Step 4: Simplify right side
   16,111.40x = 238,647,320.22
5. Step 5: Solve for x
   x = 238,647,320.22/16,111.40
6. Step 6: Final answer
   x = 14,812.33