Finding the Fourth Proportional to 3,081.02, 4,621.78 and 1,231.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,081.02 : 4,621.78 = 1,231.12 : x
2. Step 2: Convert to fraction form
   3,081.02/4,621.78 = 1,231.12/x
3. Step 3: Cross multiply
   3,081.02x = 4,621.78 × 1,231.12
4. Step 4: Simplify right side
   3,081.02x = 5,689,980.43
5. Step 5: Solve for x
   x = 5,689,980.43/3,081.02
6. Step 6: Final answer
   x = 1,846.78