Finding the Fourth Proportional to 21,667.47, 32,505.24 and 6,872.40

Step by Step Solution

1. Step 1: Write the proportion equation
   21,667.47 : 32,505.24 = 6,872.40 : x
2. Step 2: Convert to fraction form
   21,667.47/32,505.24 = 6,872.40/x
3. Step 3: Cross multiply
   21,667.47x = 32,505.24 × 6,872.40
4. Step 4: Simplify right side
   21,667.47x = 223,389,011.38
5. Step 5: Solve for x
   x = 223,389,011.38/21,667.47
6. Step 6: Final answer
   x = 10,309.88