Finding the Fourth Proportional to 12,225.72, 16,871.58 and 6,636.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,225.72 : 16,871.58 = 6,636.72 : x
2. Step 2: Convert to fraction form
   12,225.72/16,871.58 = 6,636.72/x
3. Step 3: Cross multiply
   12,225.72x = 16,871.58 × 6,636.72
4. Step 4: Simplify right side
   12,225.72x = 111,971,952.42
5. Step 5: Solve for x
   x = 111,971,952.42/12,225.72
6. Step 6: Final answer
   x = 9,158.72