Finding the Fourth Proportional to 11,215.94, 16,823.94 and 5,290.92

Step by Step Solution

1. Step 1: Write the proportion equation
   11,215.94 : 16,823.94 = 5,290.92 : x
2. Step 2: Convert to fraction form
   11,215.94/16,823.94 = 5,290.92/x
3. Step 3: Cross multiply
   11,215.94x = 16,823.94 × 5,290.92
4. Step 4: Simplify right side
   11,215.94x = 89,014,100.78
5. Step 5: Solve for x
   x = 89,014,100.78/11,215.94
6. Step 6: Final answer
   x = 7,936.40