Finding the Fourth Proportional to 12,087.76, 18,131.33 and 3,767.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.76 : 18,131.33 = 3,767.75 : x
2. Step 2: Convert to fraction form
   12,087.76/18,131.33 = 3,767.75/x
3. Step 3: Cross multiply
   12,087.76x = 18,131.33 × 3,767.75
4. Step 4: Simplify right side
   12,087.76x = 68,314,318.61
5. Step 5: Solve for x
   x = 68,314,318.61/12,087.76
6. Step 6: Final answer
   x = 5,651.53