Finding the Fourth Proportional to 12,940.83, 17,859 and 7,904.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940.83 : 17,859 = 7,904.24 : x
2. Step 2: Convert to fraction form
   12,940.83/17,859 = 7,904.24/x
3. Step 3: Cross multiply
   12,940.83x = 17,859 × 7,904.24
4. Step 4: Simplify right side
   12,940.83x = 141,161,732.87
5. Step 5: Solve for x
   x = 141,161,732.87/12,940.83
6. Step 6: Final answer
   x = 10,908.24