Finding the Fourth Proportional to 3,942.89, 5,441.20 and 2,174.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.89 : 5,441.20 = 2,174.50 : x
2. Step 2: Convert to fraction form
   3,942.89/5,441.20 = 2,174.50/x
3. Step 3: Cross multiply
   3,942.89x = 5,441.20 × 2,174.50
4. Step 4: Simplify right side
   3,942.89x = 11,831,890.77
5. Step 5: Solve for x
   x = 11,831,890.77/3,942.89
6. Step 6: Final answer
   x = 3,000.82