Finding the Fourth Proportional to 8,419.39, 12,628.96 and 3,738.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,419.39 : 12,628.96 = 3,738.15 : x
2. Step 2: Convert to fraction form
   8,419.39/12,628.96 = 3,738.15/x
3. Step 3: Cross multiply
   8,419.39x = 12,628.96 × 3,738.15
4. Step 4: Simplify right side
   8,419.39x = 47,208,958.51
5. Step 5: Solve for x
   x = 47,208,958.51/8,419.39
6. Step 6: Final answer
   x = 5,607.17