Finding the Fourth Proportional to 12,291.56, 16,956.42 and 8,928.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,291.56 : 16,956.42 = 8,928.84 : x
2. Step 2: Convert to fraction form
   12,291.56/16,956.42 = 8,928.84/x
3. Step 3: Cross multiply
   12,291.56x = 16,956.42 × 8,928.84
4. Step 4: Simplify right side
   12,291.56x = 151,401,161.15
5. Step 5: Solve for x
   x = 151,401,161.15/12,291.56
6. Step 6: Final answer
   x = 12,317.49