Finding the Fourth Proportional to 11,786.15, 17,678.01 and 3,994.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,786.15 : 17,678.01 = 3,994.76 : x
2. Step 2: Convert to fraction form
   11,786.15/17,678.01 = 3,994.76/x
3. Step 3: Cross multiply
   11,786.15x = 17,678.01 × 3,994.76
4. Step 4: Simplify right side
   11,786.15x = 70,619,407.23
5. Step 5: Solve for x
   x = 70,619,407.23/11,786.15
6. Step 6: Final answer
   x = 5,991.73