Finding the Fourth Proportional to 3,854.49, 5,783.76 and 2,100.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,854.49 : 5,783.76 = 2,100.75 : x
2. Step 2: Convert to fraction form
   3,854.49/5,783.76 = 2,100.75/x
3. Step 3: Cross multiply
   3,854.49x = 5,783.76 × 2,100.75
4. Step 4: Simplify right side
   3,854.49x = 12,150,233.82
5. Step 5: Solve for x
   x = 12,150,233.82/3,854.49
6. Step 6: Final answer
   x = 3,152.23