Finding the Fourth Proportional to 5,082.34, 7,621.89 and 1,618.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,082.34 : 7,621.89 = 1,618.78 : x
2. Step 2: Convert to fraction form
   5,082.34/7,621.89 = 1,618.78/x
3. Step 3: Cross multiply
   5,082.34x = 7,621.89 × 1,618.78
4. Step 4: Simplify right side
   5,082.34x = 12,338,163.09
5. Step 5: Solve for x
   x = 12,338,163.09/5,082.34
6. Step 6: Final answer
   x = 2,427.65