Finding the Fourth Proportional to 10,928.70, 16,385.49 and 5,581.53

Step by Step Solution

1. Step 1: Write the proportion equation
   10,928.70 : 16,385.49 = 5,581.53 : x
2. Step 2: Convert to fraction form
   10,928.70/16,385.49 = 5,581.53/x
3. Step 3: Cross multiply
   10,928.70x = 16,385.49 × 5,581.53
4. Step 4: Simplify right side
   10,928.70x = 91,456,104.00
5. Step 5: Solve for x
   x = 91,456,104.00/10,928.70
6. Step 6: Final answer
   x = 8,368.43