Finding the Fourth Proportional to 3,940.50, 5,437.83 and 2,172.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940.50 : 5,437.83 = 2,172.06 : x
2. Step 2: Convert to fraction form
   3,940.50/5,437.83 = 2,172.06/x
3. Step 3: Cross multiply
   3,940.50x = 5,437.83 × 2,172.06
4. Step 4: Simplify right side
   3,940.50x = 11,811,293.03
5. Step 5: Solve for x
   x = 11,811,293.03/3,940.50
6. Step 6: Final answer
   x = 2,997.41