Finding the Fourth Proportional to 10,968.62, 15,136.81 and 10,131.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,968.62 : 15,136.81 = 10,131.49 : x
2. Step 2: Convert to fraction form
   10,968.62/15,136.81 = 10,131.49/x
3. Step 3: Cross multiply
   10,968.62x = 15,136.81 × 10,131.49
4. Step 4: Simplify right side
   10,968.62x = 153,358,439.15
5. Step 5: Solve for x
   x = 153,358,439.15/10,968.62
6. Step 6: Final answer
   x = 13,981.56