Finding the Fourth Proportional to 12,786.04, 17,641.01 and 7,408.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,786.04 : 17,641.01 = 7,408.12 : x
2. Step 2: Convert to fraction form
   12,786.04/17,641.01 = 7,408.12/x
3. Step 3: Cross multiply
   12,786.04x = 17,641.01 × 7,408.12
4. Step 4: Simplify right side
   12,786.04x = 130,686,719.00
5. Step 5: Solve for x
   x = 130,686,719.00/12,786.04
6. Step 6: Final answer
   x = 10,221.05