Finding the Fourth Proportional to 16,852.56, 23,225.04 and 12,128.64

Step by Step Solution

1. Step 1: Write the proportion equation
   16,852.56 : 23,225.04 = 12,128.64 : x
2. Step 2: Convert to fraction form
   16,852.56/23,225.04 = 12,128.64/x
3. Step 3: Cross multiply
   16,852.56x = 23,225.04 × 12,128.64
4. Step 4: Simplify right side
   16,852.56x = 281,688,149.15
5. Step 5: Solve for x
   x = 281,688,149.15/16,852.56
6. Step 6: Final answer
   x = 16,714.86