Finding the Fourth Proportional to 5,389.55, 8,082.56 and 2,103.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,389.55 : 8,082.56 = 2,103.78 : x
2. Step 2: Convert to fraction form
   5,389.55/8,082.56 = 2,103.78/x
3. Step 3: Cross multiply
   5,389.55x = 8,082.56 × 2,103.78
4. Step 4: Simplify right side
   5,389.55x = 17,003,933.34
5. Step 5: Solve for x
   x = 17,003,933.34/5,389.55
6. Step 6: Final answer
   x = 3,154.98