Finding the Fourth Proportional to 12,156.68, 18,237.60 and 3,839.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,156.68 : 18,237.60 = 3,839.12 : x
2. Step 2: Convert to fraction form
   12,156.68/18,237.60 = 3,839.12/x
3. Step 3: Cross multiply
   12,156.68x = 18,237.60 × 3,839.12
4. Step 4: Simplify right side
   12,156.68x = 70,016,334.91
5. Step 5: Solve for x
   x = 70,016,334.91/12,156.68
6. Step 6: Final answer
   x = 5,759.49