Finding the Fourth Proportional to 10,751.79, 16,111.28 and 8,406.23

Step by Step Solution

1. Step 1: Write the proportion equation
   10,751.79 : 16,111.28 = 8,406.23 : x
2. Step 2: Convert to fraction form
   10,751.79/16,111.28 = 8,406.23/x
3. Step 3: Cross multiply
   10,751.79x = 16,111.28 × 8,406.23
4. Step 4: Simplify right side
   10,751.79x = 135,435,002.69
5. Step 5: Solve for x
   x = 135,435,002.69/10,751.79
6. Step 6: Final answer
   x = 12,596.51