Finding the Fourth Proportional to 12,942.08, 17,863.20 and 12,066.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,942.08 : 17,863.20 = 12,066.56 : x
2. Step 2: Convert to fraction form
   12,942.08/17,863.20 = 12,066.56/x
3. Step 3: Cross multiply
   12,942.08x = 17,863.20 × 12,066.56
4. Step 4: Simplify right side
   12,942.08x = 215,547,374.59
5. Step 5: Solve for x
   x = 215,547,374.59/12,942.08
6. Step 6: Final answer
   x = 16,654.77