Finding the Fourth Proportional to 5,419.69, 8,132.57 and 5,378.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,419.69 : 8,132.57 = 5,378.38 : x
2. Step 2: Convert to fraction form
   5,419.69/8,132.57 = 5,378.38/x
3. Step 3: Cross multiply
   5,419.69x = 8,132.57 × 5,378.38
4. Step 4: Simplify right side
   5,419.69x = 43,740,024.78
5. Step 5: Solve for x
   x = 43,740,024.78/5,419.69
6. Step 6: Final answer
   x = 8,070.58