Finding the Fourth Proportional to 16,643.56, 22,971.04 and 9,929.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,643.56 : 22,971.04 = 9,929.60 : x
2. Step 2: Convert to fraction form
   16,643.56/22,971.04 = 9,929.60/x
3. Step 3: Cross multiply
   16,643.56x = 22,971.04 × 9,929.60
4. Step 4: Simplify right side
   16,643.56x = 228,093,238.78
5. Step 5: Solve for x
   x = 228,093,238.78/16,643.56
6. Step 6: Final answer
   x = 13,704.59