Finding the Fourth Proportional to 12,164.40, 16,789.56 and 7,908.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,164.40 : 16,789.56 = 7,908.06 : x
2. Step 2: Convert to fraction form
   12,164.40/16,789.56 = 7,908.06/x
3. Step 3: Cross multiply
   12,164.40x = 16,789.56 × 7,908.06
4. Step 4: Simplify right side
   12,164.40x = 132,772,847.85
5. Step 5: Solve for x
   x = 132,772,847.85/12,164.40
6. Step 6: Final answer
   x = 10,914.87