Finding the Fourth Proportional to 6,494.12, 8,963.44 and 3,978.34

Step by Step Solution

1. Step 1: Write the proportion equation
   6,494.12 : 8,963.44 = 3,978.34 : x
2. Step 2: Convert to fraction form
   6,494.12/8,963.44 = 3,978.34/x
3. Step 3: Cross multiply
   6,494.12x = 8,963.44 × 3,978.34
4. Step 4: Simplify right side
   6,494.12x = 35,659,611.89
5. Step 5: Solve for x
   x = 35,659,611.89/6,494.12
6. Step 6: Final answer
   x = 5,491.06