Finding the Fourth Proportional to 2,845.31, 3,928.55 and 2,374.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,845.31 : 3,928.55 = 2,374.42 : x
2. Step 2: Convert to fraction form
   2,845.31/3,928.55 = 2,374.42/x
3. Step 3: Cross multiply
   2,845.31x = 3,928.55 × 2,374.42
4. Step 4: Simplify right side
   2,845.31x = 9,328,017.82
5. Step 5: Solve for x
   x = 9,328,017.82/2,845.31
6. Step 6: Final answer
   x = 3,278.39