Finding the Fourth Proportional to 11,881.38, 17,809.57 and 3,981.94

Step by Step Solution

1. Step 1: Write the proportion equation
   11,881.38 : 17,809.57 = 3,981.94 : x
2. Step 2: Convert to fraction form
   11,881.38/17,809.57 = 3,981.94/x
3. Step 3: Cross multiply
   11,881.38x = 17,809.57 × 3,981.94
4. Step 4: Simplify right side
   11,881.38x = 70,916,639.17
5. Step 5: Solve for x
   x = 70,916,639.17/11,881.38
6. Step 6: Final answer
   x = 5,968.72