Finding the Fourth Proportional to 12,979.91, 17,904.15 and 7,935.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,979.91 : 17,904.15 = 7,935.38 : x
2. Step 2: Convert to fraction form
   12,979.91/17,904.15 = 7,935.38/x
3. Step 3: Cross multiply
   12,979.91x = 17,904.15 × 7,935.38
4. Step 4: Simplify right side
   12,979.91x = 142,076,233.83
5. Step 5: Solve for x
   x = 142,076,233.83/12,979.91
6. Step 6: Final answer
   x = 10,945.86