Finding the Fourth Proportional to 12,131.64, 18,196.23 and 3,811.74

Step by Step Solution

1. Step 1: Write the proportion equation
   12,131.64 : 18,196.23 = 3,811.74 : x
2. Step 2: Convert to fraction form
   12,131.64/18,196.23 = 3,811.74/x
3. Step 3: Cross multiply
   12,131.64x = 18,196.23 × 3,811.74
4. Step 4: Simplify right side
   12,131.64x = 69,359,297.74
5. Step 5: Solve for x
   x = 69,359,297.74/12,131.64
6. Step 6: Final answer
   x = 5,717.22