Finding the Fourth Proportional to 10,978.47, 16,469.19 and 3,580.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.47 : 16,469.19 = 3,580.47 : x
2. Step 2: Convert to fraction form
   10,978.47/16,469.19 = 3,580.47/x
3. Step 3: Cross multiply
   10,978.47x = 16,469.19 × 3,580.47
4. Step 4: Simplify right side
   10,978.47x = 58,967,440.72
5. Step 5: Solve for x
   x = 58,967,440.72/10,978.47
6. Step 6: Final answer
   x = 5,371.19