Finding the Fourth Proportional to 12,406.22, 17,018.04 and 12,147.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,406.22 : 17,018.04 = 12,147.02 : x
2. Step 2: Convert to fraction form
   12,406.22/17,018.04 = 12,147.02/x
3. Step 3: Cross multiply
   12,406.22x = 17,018.04 × 12,147.02
4. Step 4: Simplify right side
   12,406.22x = 206,718,411.51
5. Step 5: Solve for x
   x = 206,718,411.51/12,406.22
6. Step 6: Final answer
   x = 16,662.48