Finding the Fourth Proportional to 6,978.63, 10,481.82 and 4,172.88

Step by Step Solution

1. Step 1: Write the proportion equation
   6,978.63 : 10,481.82 = 4,172.88 : x
2. Step 2: Convert to fraction form
   6,978.63/10,481.82 = 4,172.88/x
3. Step 3: Cross multiply
   6,978.63x = 10,481.82 × 4,172.88
4. Step 4: Simplify right side
   6,978.63x = 43,739,377.04
5. Step 5: Solve for x
   x = 43,739,377.04/6,978.63
6. Step 6: Final answer
   x = 6,267.62