Finding the Fourth Proportional to 10,981.89, 16,452.15 and 5,428.73

Step by Step Solution

1. Step 1: Write the proportion equation
   10,981.89 : 16,452.15 = 5,428.73 : x
2. Step 2: Convert to fraction form
   10,981.89/16,452.15 = 5,428.73/x
3. Step 3: Cross multiply
   10,981.89x = 16,452.15 × 5,428.73
4. Step 4: Simplify right side
   10,981.89x = 89,314,198.01
5. Step 5: Solve for x
   x = 89,314,198.01/10,981.89
6. Step 6: Final answer
   x = 8,132.86