Finding the Fourth Proportional to 12,411.54, 17,128.71 and 7,108.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,411.54 : 17,128.71 = 7,108.11 : x
2. Step 2: Convert to fraction form
   12,411.54/17,128.71 = 7,108.11/x
3. Step 3: Cross multiply
   12,411.54x = 17,128.71 × 7,108.11
4. Step 4: Simplify right side
   12,411.54x = 121,752,754.84
5. Step 5: Solve for x
   x = 121,752,754.84/12,411.54
6. Step 6: Final answer
   x = 9,809.64