Finding the Fourth Proportional to 3,155.34, 4,353.60 and 2,078.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,155.34 : 4,353.60 = 2,078.50 : x
2. Step 2: Convert to fraction form
   3,155.34/4,353.60 = 2,078.50/x
3. Step 3: Cross multiply
   3,155.34x = 4,353.60 × 2,078.50
4. Step 4: Simplify right side
   3,155.34x = 9,048,957.60
5. Step 5: Solve for x
   x = 9,048,957.60/3,155.34
6. Step 6: Final answer
   x = 2,867.82