Finding the Fourth Proportional to 10,280.69, 15,421.61 and 5,020.19

Step by Step Solution

1. Step 1: Write the proportion equation
   10,280.69 : 15,421.61 = 5,020.19 : x
2. Step 2: Convert to fraction form
   10,280.69/15,421.61 = 5,020.19/x
3. Step 3: Cross multiply
   10,280.69x = 15,421.61 × 5,020.19
4. Step 4: Simplify right side
   10,280.69x = 77,419,310.10
5. Step 5: Solve for x
   x = 77,419,310.10/10,280.69
6. Step 6: Final answer
   x = 7,530.56