Finding the Fourth Proportional to 12,981.36, 17,913.59 and 7,316.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,981.36 : 17,913.59 = 7,316.12 : x
2. Step 2: Convert to fraction form
   12,981.36/17,913.59 = 7,316.12/x
3. Step 3: Cross multiply
   12,981.36x = 17,913.59 × 7,316.12
4. Step 4: Simplify right side
   12,981.36x = 131,057,974.07
5. Step 5: Solve for x
   x = 131,057,974.07/12,981.36
6. Step 6: Final answer
   x = 10,095.86