Finding the Fourth Proportional to 12,131.88, 18,197.83 and 3,812.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,131.88 : 18,197.83 = 3,812.64 : x
2. Step 2: Convert to fraction form
   12,131.88/18,197.83 = 3,812.64/x
3. Step 3: Cross multiply
   12,131.88x = 18,197.83 × 3,812.64
4. Step 4: Simplify right side
   12,131.88x = 69,381,711.10
5. Step 5: Solve for x
   x = 69,381,711.10/12,131.88
6. Step 6: Final answer
   x = 5,718.96