Finding the Fourth Proportional to 7,111.82, 10,667.82 and 3,991.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.82 : 10,667.82 = 3,991.34 : x
2. Step 2: Convert to fraction form
   7,111.82/10,667.82 = 3,991.34/x
3. Step 3: Cross multiply
   7,111.82x = 10,667.82 × 3,991.34
4. Step 4: Simplify right side
   7,111.82x = 42,578,896.68
5. Step 5: Solve for x
   x = 42,578,896.68/7,111.82
6. Step 6: Final answer
   x = 5,987.06