Finding the Fourth Proportional to 3,978.86, 5,953.70 and 2,676.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.86 : 5,953.70 = 2,676.38 : x
2. Step 2: Convert to fraction form
   3,978.86/5,953.70 = 2,676.38/x
3. Step 3: Cross multiply
   3,978.86x = 5,953.70 × 2,676.38
4. Step 4: Simplify right side
   3,978.86x = 15,934,340.53
5. Step 5: Solve for x
   x = 15,934,340.53/3,978.86
6. Step 6: Final answer
   x = 4,004.76