Finding the Fourth Proportional to 2,774.27, 4,140.18 and 2,478.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,774.27 : 4,140.18 = 2,478.45 : x
2. Step 2: Convert to fraction form
   2,774.27/4,140.18 = 2,478.45/x
3. Step 3: Cross multiply
   2,774.27x = 4,140.18 × 2,478.45
4. Step 4: Simplify right side
   2,774.27x = 10,261,229.12
5. Step 5: Solve for x
   x = 10,261,229.12/2,774.27
6. Step 6: Final answer
   x = 3,698.71