Finding the Fourth Proportional to 5,131.35, 7,697.57 and 1,667.79

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.35 : 7,697.57 = 1,667.79 : x
2. Step 2: Convert to fraction form
   5,131.35/7,697.57 = 1,667.79/x
3. Step 3: Cross multiply
   5,131.35x = 7,697.57 × 1,667.79
4. Step 4: Simplify right side
   5,131.35x = 12,837,921.93
5. Step 5: Solve for x
   x = 12,837,921.93/5,131.35
6. Step 6: Final answer
   x = 2,501.86