Finding the Fourth Proportional to 10,989.48, 16,456.50 and 7,280.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,989.48 : 16,456.50 = 7,280.52 : x
2. Step 2: Convert to fraction form
   10,989.48/16,456.50 = 7,280.52/x
3. Step 3: Cross multiply
   10,989.48x = 16,456.50 × 7,280.52
4. Step 4: Simplify right side
   10,989.48x = 119,811,877.38
5. Step 5: Solve for x
   x = 119,811,877.38/10,989.48
6. Step 6: Final answer
   x = 10,902.42