Finding the Fourth Proportional to 12,942.40, 17,867.46 and 8,700.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,942.40 : 17,867.46 = 8,700.28 : x
2. Step 2: Convert to fraction form
   12,942.40/17,867.46 = 8,700.28/x
3. Step 3: Cross multiply
   12,942.40x = 17,867.46 × 8,700.28
4. Step 4: Simplify right side
   12,942.40x = 155,451,904.89
5. Step 5: Solve for x
   x = 155,451,904.89/12,942.40
6. Step 6: Final answer
   x = 12,011.06