Finding the Fourth Proportional to 3,679.34, 5,078.56 and 2,188.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,679.34 : 5,078.56 = 2,188.30 : x
2. Step 2: Convert to fraction form
   3,679.34/5,078.56 = 2,188.30/x
3. Step 3: Cross multiply
   3,679.34x = 5,078.56 × 2,188.30
4. Step 4: Simplify right side
   3,679.34x = 11,113,412.85
5. Step 5: Solve for x
   x = 11,113,412.85/3,679.34
6. Step 6: Final answer
   x = 3,020.49