Finding the Fourth Proportional to 12,144.39, 18,200.81 and 5,475.99

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144.39 : 18,200.81 = 5,475.99 : x
2. Step 2: Convert to fraction form
   12,144.39/18,200.81 = 5,475.99/x
3. Step 3: Cross multiply
   12,144.39x = 18,200.81 × 5,475.99
4. Step 4: Simplify right side
   12,144.39x = 99,667,426.17
5. Step 5: Solve for x
   x = 99,667,426.17/12,144.39
6. Step 6: Final answer
   x = 8,206.87