Finding the Fourth Proportional to 12,606.39, 18,911.64 and 3,839.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,606.39 : 18,911.64 = 3,839.25 : x
2. Step 2: Convert to fraction form
   12,606.39/18,911.64 = 3,839.25/x
3. Step 3: Cross multiply
   12,606.39x = 18,911.64 × 3,839.25
4. Step 4: Simplify right side
   12,606.39x = 72,606,513.87
5. Step 5: Solve for x
   x = 72,606,513.87/12,606.39
6. Step 6: Final answer
   x = 5,759.50