Finding the Fourth Proportional to 3,185.67, 4,778.89 and 845.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,185.67 : 4,778.89 = 845.72 : x
2. Step 2: Convert to fraction form
   3,185.67/4,778.89 = 845.72/x
3. Step 3: Cross multiply
   3,185.67x = 4,778.89 × 845.72
4. Step 4: Simplify right side
   3,185.67x = 4,041,602.85
5. Step 5: Solve for x
   x = 4,041,602.85/3,185.67
6. Step 6: Final answer
   x = 1,268.68