Finding the Fourth Proportional to 12,009.05, 18,008.96 and 8,300.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,009.05 : 18,008.96 = 8,300.04 : x
2. Step 2: Convert to fraction form
   12,009.05/18,008.96 = 8,300.04/x
3. Step 3: Cross multiply
   12,009.05x = 18,008.96 × 8,300.04
4. Step 4: Simplify right side
   12,009.05x = 149,474,979.32
5. Step 5: Solve for x
   x = 149,474,979.32/12,009.05
6. Step 6: Final answer
   x = 12,446.86