Finding the Fourth Proportional to 3,978.25, 5,955.05 and 3,387.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.25 : 5,955.05 = 3,387.76 : x
2. Step 2: Convert to fraction form
   3,978.25/5,955.05 = 3,387.76/x
3. Step 3: Cross multiply
   3,978.25x = 5,955.05 × 3,387.76
4. Step 4: Simplify right side
   3,978.25x = 20,174,273.77
5. Step 5: Solve for x
   x = 20,174,273.77/3,978.25
6. Step 6: Final answer
   x = 5,071.15