Finding the Fourth Proportional to 3,912.04, 5,865.47 and 2,157.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912.04 : 5,865.47 = 2,157.89 : x
2. Step 2: Convert to fraction form
   3,912.04/5,865.47 = 2,157.89/x
3. Step 3: Cross multiply
   3,912.04x = 5,865.47 × 2,157.89
4. Step 4: Simplify right side
   3,912.04x = 12,657,007.03
5. Step 5: Solve for x
   x = 12,657,007.03/3,912.04
6. Step 6: Final answer
   x = 3,235.40