Finding the Fourth Proportional to 6,978.74, 10,464.06 and 2,815.34

Step by Step Solution

1. Step 1: Write the proportion equation
   6,978.74 : 10,464.06 = 2,815.34 : x
2. Step 2: Convert to fraction form
   6,978.74/10,464.06 = 2,815.34/x
3. Step 3: Cross multiply
   6,978.74x = 10,464.06 × 2,815.34
4. Step 4: Simplify right side
   6,978.74x = 29,459,886.68
5. Step 5: Solve for x
   x = 29,459,886.68/6,978.74
6. Step 6: Final answer
   x = 4,221.38