Finding the Fourth Proportional to 12,328.94, 17,128.71 and 12,181.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,328.94 : 17,128.71 = 12,181.32 : x
2. Step 2: Convert to fraction form
   12,328.94/17,128.71 = 12,181.32/x
3. Step 3: Cross multiply
   12,328.94x = 17,128.71 × 12,181.32
4. Step 4: Simplify right side
   12,328.94x = 208,650,212.05
5. Step 5: Solve for x
   x = 208,650,212.05/12,328.94
6. Step 6: Final answer
   x = 16,923.62