Finding the Fourth Proportional to 12,785.14, 17,639.27 and 7,476.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,785.14 : 17,639.27 = 7,476.20 : x
2. Step 2: Convert to fraction form
   12,785.14/17,639.27 = 7,476.20/x
3. Step 3: Cross multiply
   12,785.14x = 17,639.27 × 7,476.20
4. Step 4: Simplify right side
   12,785.14x = 131,874,628.89
5. Step 5: Solve for x
   x = 131,874,628.89/12,785.14
6. Step 6: Final answer
   x = 10,314.68