Finding the Fourth Proportional to 10,978.28, 16,469.01 and 3,580.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.28 : 16,469.01 = 3,580.91 : x
2. Step 2: Convert to fraction form
   10,978.28/16,469.01 = 3,580.91/x
3. Step 3: Cross multiply
   10,978.28x = 16,469.01 × 3,580.91
4. Step 4: Simplify right side
   10,978.28x = 58,974,083.77
5. Step 5: Solve for x
   x = 58,974,083.77/10,978.28
6. Step 6: Final answer
   x = 5,371.89