Finding the Fourth Proportional to 3,185.16, 4,776.78 and 1,236.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,185.16 : 4,776.78 = 1,236.90 : x
2. Step 2: Convert to fraction form
   3,185.16/4,776.78 = 1,236.90/x
3. Step 3: Cross multiply
   3,185.16x = 4,776.78 × 1,236.90
4. Step 4: Simplify right side
   3,185.16x = 5,908,399.18
5. Step 5: Solve for x
   x = 5,908,399.18/3,185.16
6. Step 6: Final answer
   x = 1,854.98