Finding the Fourth Proportional to 11,906.51, 17,857.51 and 5,981.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,906.51 : 17,857.51 = 5,981.81 : x
2. Step 2: Convert to fraction form
   11,906.51/17,857.51 = 5,981.81/x
3. Step 3: Cross multiply
   11,906.51x = 17,857.51 × 5,981.81
4. Step 4: Simplify right side
   11,906.51x = 106,820,231.89
5. Step 5: Solve for x
   x = 106,820,231.89/11,906.51
6. Step 6: Final answer
   x = 8,971.58