Finding the Fourth Proportional to 12,449.30, 17,156.39 and 8,906.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,449.30 : 17,156.39 = 8,906.36 : x
2. Step 2: Convert to fraction form
   12,449.30/17,156.39 = 8,906.36/x
3. Step 3: Cross multiply
   12,449.30x = 17,156.39 × 8,906.36
4. Step 4: Simplify right side
   12,449.30x = 152,800,855.33
5. Step 5: Solve for x
   x = 152,800,855.33/12,449.30
6. Step 6: Final answer
   x = 12,273.86