Finding the Fourth Proportional to 6,978.53, 9,630.24 and 3,994.58

Step by Step Solution

1. Step 1: Write the proportion equation
   6,978.53 : 9,630.24 = 3,994.58 : x
2. Step 2: Convert to fraction form
   6,978.53/9,630.24 = 3,994.58/x
3. Step 3: Cross multiply
   6,978.53x = 9,630.24 × 3,994.58
4. Step 4: Simplify right side
   6,978.53x = 38,468,764.10
5. Step 5: Solve for x
   x = 38,468,764.10/6,978.53
6. Step 6: Final answer
   x = 5,512.45