Finding the Fourth Proportional to 12,806.64, 17,673.24 and 7,141.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,806.64 : 17,673.24 = 7,141.86 : x
2. Step 2: Convert to fraction form
   12,806.64/17,673.24 = 7,141.86/x
3. Step 3: Cross multiply
   12,806.64x = 17,673.24 × 7,141.86
4. Step 4: Simplify right side
   12,806.64x = 126,219,805.83
5. Step 5: Solve for x
   x = 126,219,805.83/12,806.64
6. Step 6: Final answer
   x = 9,855.81