Finding the Fourth Proportional to 3,942.61, 5,440.71 and 2,174.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.61 : 5,440.71 = 2,174.22 : x
2. Step 2: Convert to fraction form
   3,942.61/5,440.71 = 2,174.22/x
3. Step 3: Cross multiply
   3,942.61x = 5,440.71 × 2,174.22
4. Step 4: Simplify right side
   3,942.61x = 11,829,300.50
5. Step 5: Solve for x
   x = 11,829,300.50/3,942.61
6. Step 6: Final answer
   x = 3,000.37