Finding the Fourth Proportional to 10,991.82, 15,168.72 and 5,956.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.82 : 15,168.72 = 5,956.09 : x
2. Step 2: Convert to fraction form
   10,991.82/15,168.72 = 5,956.09/x
3. Step 3: Cross multiply
   10,991.82x = 15,168.72 × 5,956.09
4. Step 4: Simplify right side
   10,991.82x = 90,346,261.50
5. Step 5: Solve for x
   x = 90,346,261.50/10,991.82
6. Step 6: Final answer
   x = 8,219.41