Finding the Fourth Proportional to 3,978.48, 5,955.57 and 2,731.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.48 : 5,955.57 = 2,731.89 : x
2. Step 2: Convert to fraction form
   3,978.48/5,955.57 = 2,731.89/x
3. Step 3: Cross multiply
   3,978.48x = 5,955.57 × 2,731.89
4. Step 4: Simplify right side
   3,978.48x = 16,269,962.13
5. Step 5: Solve for x
   x = 16,269,962.13/3,978.48
6. Step 6: Final answer
   x = 4,089.49