Finding the Fourth Proportional to 12,540.98, 18,811.50 and 3,181

Step by Step Solution

1. Step 1: Write the proportion equation
   12,540.98 : 18,811.50 = 3,181 : x
2. Step 2: Convert to fraction form
   12,540.98/18,811.50 = 3,181/x
3. Step 3: Cross multiply
   12,540.98x = 18,811.50 × 3,181
4. Step 4: Simplify right side
   12,540.98x = 59,839,381.50
5. Step 5: Solve for x
   x = 59,839,381.50/12,540.98
6. Step 6: Final answer
   x = 4,771.51