Finding the Fourth Proportional to 8,112.72, 12,147.06 and 6,785.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,112.72 : 12,147.06 = 6,785.94 : x
2. Step 2: Convert to fraction form
   8,112.72/12,147.06 = 6,785.94/x
3. Step 3: Cross multiply
   8,112.72x = 12,147.06 × 6,785.94
4. Step 4: Simplify right side
   8,112.72x = 82,429,220.34
5. Step 5: Solve for x
   x = 82,429,220.34/8,112.72
6. Step 6: Final answer
   x = 10,160.49