Finding the Fourth Proportional to 5,356.69, 7,982.45 and 5,180.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,356.69 : 7,982.45 = 5,180.50 : x
2. Step 2: Convert to fraction form
   5,356.69/7,982.45 = 5,180.50/x
3. Step 3: Cross multiply
   5,356.69x = 7,982.45 × 5,180.50
4. Step 4: Simplify right side
   5,356.69x = 41,353,082.23
5. Step 5: Solve for x
   x = 41,353,082.23/5,356.69
6. Step 6: Final answer
   x = 7,719.89