Finding the Fourth Proportional to 5,078.56, 7,008.24 and 2,870.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,078.56 : 7,008.24 = 2,870.56 : x
2. Step 2: Convert to fraction form
   5,078.56/7,008.24 = 2,870.56/x
3. Step 3: Cross multiply
   5,078.56x = 7,008.24 × 2,870.56
4. Step 4: Simplify right side
   5,078.56x = 20,117,573.41
5. Step 5: Solve for x
   x = 20,117,573.41/5,078.56
6. Step 6: Final answer
   x = 3,961.28