Finding the Fourth Proportional to 5,131.92, 7,690.05 and 2,667.54

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.92 : 7,690.05 = 2,667.54 : x
2. Step 2: Convert to fraction form
   5,131.92/7,690.05 = 2,667.54/x
3. Step 3: Cross multiply
   5,131.92x = 7,690.05 × 2,667.54
4. Step 4: Simplify right side
   5,131.92x = 20,513,515.98
5. Step 5: Solve for x
   x = 20,513,515.98/5,131.92
6. Step 6: Final answer
   x = 3,997.24