Finding the Fourth Proportional to 3,111.44, 4,642.78 and 2,784.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.44 : 4,642.78 = 2,784.56 : x
2. Step 2: Convert to fraction form
   3,111.44/4,642.78 = 2,784.56/x
3. Step 3: Cross multiply
   3,111.44x = 4,642.78 × 2,784.56
4. Step 4: Simplify right side
   3,111.44x = 12,928,099.48
5. Step 5: Solve for x
   x = 12,928,099.48/3,111.44
6. Step 6: Final answer
   x = 4,155.02