Finding the Fourth Proportional to 12,981.14, 17,914.32 and 7,945.26

Step by Step Solution

1. Step 1: Write the proportion equation
   12,981.14 : 17,914.32 = 7,945.26 : x
2. Step 2: Convert to fraction form
   12,981.14/17,914.32 = 7,945.26/x
3. Step 3: Cross multiply
   12,981.14x = 17,914.32 × 7,945.26
4. Step 4: Simplify right side
   12,981.14x = 142,333,930.12
5. Step 5: Solve for x
   x = 142,333,930.12/12,981.14
6. Step 6: Final answer
   x = 10,964.67