Finding the Fourth Proportional to 10,911.81, 16,370.91 and 3,516.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,911.81 : 16,370.91 = 3,516.12 : x
2. Step 2: Convert to fraction form
   10,911.81/16,370.91 = 3,516.12/x
3. Step 3: Cross multiply
   10,911.81x = 16,370.91 × 3,516.12
4. Step 4: Simplify right side
   10,911.81x = 57,562,084.07
5. Step 5: Solve for x
   x = 57,562,084.07/10,911.81
6. Step 6: Final answer
   x = 5,275.21