Finding the Fourth Proportional to 10,981.50, 16,488.66 and 10,817.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,981.50 : 16,488.66 = 10,817.47 : x
2. Step 2: Convert to fraction form
   10,981.50/16,488.66 = 10,817.47/x
3. Step 3: Cross multiply
   10,981.50x = 16,488.66 × 10,817.47
4. Step 4: Simplify right side
   10,981.50x = 178,365,601.17
5. Step 5: Solve for x
   x = 178,365,601.17/10,981.50
6. Step 6: Final answer
   x = 16,242.37