Finding the Fourth Proportional to 12,410.29, 17,119.78 and 7,686.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,410.29 : 17,119.78 = 7,686.37 : x
2. Step 2: Convert to fraction form
   12,410.29/17,119.78 = 7,686.37/x
3. Step 3: Cross multiply
   12,410.29x = 17,119.78 × 7,686.37
4. Step 4: Simplify right side
   12,410.29x = 131,588,963.40
5. Step 5: Solve for x
   x = 131,588,963.40/12,410.29
6. Step 6: Final answer
   x = 10,603.21