Finding the Fourth Proportional to 3,941.61, 5,439.33 and 2,173.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,941.61 : 5,439.33 = 2,173.22 : x
2. Step 2: Convert to fraction form
   3,941.61/5,439.33 = 2,173.22/x
3. Step 3: Cross multiply
   3,941.61x = 5,439.33 × 2,173.22
4. Step 4: Simplify right side
   3,941.61x = 11,820,838.98
5. Step 5: Solve for x
   x = 11,820,838.98/3,941.61
6. Step 6: Final answer
   x = 2,998.99