Finding the Fourth Proportional to 5,647.31, 7,796.00 and 3,970.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,647.31 : 7,796.00 = 3,970.15 : x
2. Step 2: Convert to fraction form
   5,647.31/7,796.00 = 3,970.15/x
3. Step 3: Cross multiply
   5,647.31x = 7,796.00 × 3,970.15
4. Step 4: Simplify right side
   5,647.31x = 30,951,290.39
5. Step 5: Solve for x
   x = 30,951,290.39/5,647.31
6. Step 6: Final answer
   x = 5,480.72