Finding the Fourth Proportional to 5,667.20, 8,491.52 and 5,451.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,667.20 : 8,491.52 = 5,451.20 : x
2. Step 2: Convert to fraction form
   5,667.20/8,491.52 = 5,451.20/x
3. Step 3: Cross multiply
   5,667.20x = 8,491.52 × 5,451.20
4. Step 4: Simplify right side
   5,667.20x = 46,288,973.82
5. Step 5: Solve for x
   x = 46,288,973.82/5,667.20
6. Step 6: Final answer
   x = 8,167.87