Finding the Fourth Proportional to 3,995.12, 5,502.72 and 3,973.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,995.12 : 5,502.72 = 3,973.20 : x
2. Step 2: Convert to fraction form
   3,995.12/5,502.72 = 3,973.20/x
3. Step 3: Cross multiply
   3,995.12x = 5,502.72 × 3,973.20
4. Step 4: Simplify right side
   3,995.12x = 21,863,407.10
5. Step 5: Solve for x
   x = 21,863,407.10/3,995.12
6. Step 6: Final answer
   x = 5,472.53