Finding the Fourth Proportional to 3,943.89, 5,442.50 and 2,151.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,943.89 : 5,442.50 = 2,151.39 : x
2. Step 2: Convert to fraction form
   3,943.89/5,442.50 = 2,151.39/x
3. Step 3: Cross multiply
   3,943.89x = 5,442.50 × 2,151.39
4. Step 4: Simplify right side
   3,943.89x = 11,708,929.32
5. Step 5: Solve for x
   x = 11,708,929.32/3,943.89
6. Step 6: Final answer
   x = 2,968.88