Finding the Fourth Proportional to 12,051.54, 18,097.43 and 8,128.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,051.54 : 18,097.43 = 8,128.08 : x
2. Step 2: Convert to fraction form
   12,051.54/18,097.43 = 8,128.08/x
3. Step 3: Cross multiply
   12,051.54x = 18,097.43 × 8,128.08
4. Step 4: Simplify right side
   12,051.54x = 147,097,318.19
5. Step 5: Solve for x
   x = 147,097,318.19/12,051.54
6. Step 6: Final answer
   x = 12,205.69