Finding the Fourth Proportional to 12,667.19, 19,003.49 and 3,783.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.19 : 19,003.49 = 3,783.21 : x
2. Step 2: Convert to fraction form
   12,667.19/19,003.49 = 3,783.21/x
3. Step 3: Cross multiply
   12,667.19x = 19,003.49 × 3,783.21
4. Step 4: Simplify right side
   12,667.19x = 71,894,299.03
5. Step 5: Solve for x
   x = 71,894,299.03/12,667.19
6. Step 6: Final answer
   x = 5,675.63