Finding the Fourth Proportional to 10,971.72, 16,441.16 and 10,151.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,971.72 : 16,441.16 = 10,151.60 : x
2. Step 2: Convert to fraction form
   10,971.72/16,441.16 = 10,151.60/x
3. Step 3: Cross multiply
   10,971.72x = 16,441.16 × 10,151.60
4. Step 4: Simplify right side
   10,971.72x = 166,903,946.89
5. Step 5: Solve for x
   x = 166,903,946.89/10,971.72
6. Step 6: Final answer
   x = 15,212.20