Finding the Fourth Proportional to 5,131.31, 7,703.60 and 2,667.85

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.31 : 7,703.60 = 2,667.85 : x
2. Step 2: Convert to fraction form
   5,131.31/7,703.60 = 2,667.85/x
3. Step 3: Cross multiply
   5,131.31x = 7,703.60 × 2,667.85
4. Step 4: Simplify right side
   5,131.31x = 20,552,016.66
5. Step 5: Solve for x
   x = 20,552,016.66/5,131.31
6. Step 6: Final answer
   x = 4,005.22