Finding the Fourth Proportional to 12,056.72, 16,638.39 and 6,679.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,056.72 : 16,638.39 = 6,679.31 : x
2. Step 2: Convert to fraction form
   12,056.72/16,638.39 = 6,679.31/x
3. Step 3: Cross multiply
   12,056.72x = 16,638.39 × 6,679.31
4. Step 4: Simplify right side
   12,056.72x = 111,132,964.71
5. Step 5: Solve for x
   x = 111,132,964.71/12,056.72
6. Step 6: Final answer
   x = 9,217.52