Finding the Fourth Proportional to 6,667.12, 9,199.20 and 3,871.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,667.12 : 9,199.20 = 3,871.12 : x
2. Step 2: Convert to fraction form
   6,667.12/9,199.20 = 3,871.12/x
3. Step 3: Cross multiply
   6,667.12x = 9,199.20 × 3,871.12
4. Step 4: Simplify right side
   6,667.12x = 35,611,207.10
5. Step 5: Solve for x
   x = 35,611,207.10/6,667.12
6. Step 6: Final answer
   x = 5,341.32