Finding the Fourth Proportional to 3,854.89, 5,783.35 and 1,880.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,854.89 : 5,783.35 = 1,880.31 : x
2. Step 2: Convert to fraction form
   3,854.89/5,783.35 = 1,880.31/x
3. Step 3: Cross multiply
   3,854.89x = 5,783.35 × 1,880.31
4. Step 4: Simplify right side
   3,854.89x = 10,874,511.35
5. Step 5: Solve for x
   x = 10,874,511.35/3,854.89
6. Step 6: Final answer
   x = 2,820.96