Finding the Fourth Proportional to 11,872.17, 17,809.46 and 3,107.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,872.17 : 17,809.46 = 3,107.16 : x
2. Step 2: Convert to fraction form
   11,872.17/17,809.46 = 3,107.16/x
3. Step 3: Cross multiply
   11,872.17x = 17,809.46 × 3,107.16
4. Step 4: Simplify right side
   11,872.17x = 55,336,841.73
5. Step 5: Solve for x
   x = 55,336,841.73/11,872.17
6. Step 6: Final answer
   x = 4,661.06