Finding the Fourth Proportional to 9,400.78, 14,104.86 and 3,856.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,400.78 : 14,104.86 = 3,856.78 : x
2. Step 2: Convert to fraction form
   9,400.78/14,104.86 = 3,856.78/x
3. Step 3: Cross multiply
   9,400.78x = 14,104.86 × 3,856.78
4. Step 4: Simplify right side
   9,400.78x = 54,399,341.95
5. Step 5: Solve for x
   x = 54,399,341.95/9,400.78
6. Step 6: Final answer
   x = 5,786.68