Finding the Fourth Proportional to 12,806.01, 17,672.21 and 7,140.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,806.01 : 17,672.21 = 7,140.82 : x
2. Step 2: Convert to fraction form
   12,806.01/17,672.21 = 7,140.82/x
3. Step 3: Cross multiply
   12,806.01x = 17,672.21 × 7,140.82
4. Step 4: Simplify right side
   12,806.01x = 126,194,140.51
5. Step 5: Solve for x
   x = 126,194,140.51/12,806.01
6. Step 6: Final answer
   x = 9,854.29