Finding the Fourth Proportional to 3,978.92, 5,967.68 and 1,787.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.92 : 5,967.68 = 1,787.27 : x
2. Step 2: Convert to fraction form
   3,978.92/5,967.68 = 1,787.27/x
3. Step 3: Cross multiply
   3,978.92x = 5,967.68 × 1,787.27
4. Step 4: Simplify right side
   3,978.92x = 10,665,816.66
5. Step 5: Solve for x
   x = 10,665,816.66/3,978.92
6. Step 6: Final answer
   x = 2,680.58