Finding the Fourth Proportional to 12,225, 16,870.86 and 6,636.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,225 : 16,870.86 = 6,636.36 : x
2. Step 2: Convert to fraction form
   12,225/16,870.86 = 6,636.36/x
3. Step 3: Cross multiply
   12,225x = 16,870.86 × 6,636.36
4. Step 4: Simplify right side
   12,225x = 111,961,100.47
5. Step 5: Solve for x
   x = 111,961,100.47/12,225
6. Step 6: Final answer
   x = 9,158.37