Finding the Fourth Proportional to 12,976.14, 17,907.43 and 7,940.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,976.14 : 17,907.43 = 7,940.27 : x
2. Step 2: Convert to fraction form
   12,976.14/17,907.43 = 7,940.27/x
3. Step 3: Cross multiply
   12,976.14x = 17,907.43 × 7,940.27
4. Step 4: Simplify right side
   12,976.14x = 142,189,829.21
5. Step 5: Solve for x
   x = 142,189,829.21/12,976.14
6. Step 6: Final answer
   x = 10,957.79