Finding the Fourth Proportional to 3,967.72, 5,475.60 and 2,199.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,967.72 : 5,475.60 = 2,199.31 : x
2. Step 2: Convert to fraction form
   3,967.72/5,475.60 = 2,199.31/x
3. Step 3: Cross multiply
   3,967.72x = 5,475.60 × 2,199.31
4. Step 4: Simplify right side
   3,967.72x = 12,042,528.15
5. Step 5: Solve for x
   x = 12,042,528.15/3,967.72
6. Step 6: Final answer
   x = 3,035.13