Finding the Fourth Proportional to 11,315.49, 16,853.69 and 10,722.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,315.49 : 16,853.69 = 10,722.69 : x
2. Step 2: Convert to fraction form
   11,315.49/16,853.69 = 10,722.69/x
3. Step 3: Cross multiply
   11,315.49x = 16,853.69 × 10,722.69
4. Step 4: Simplify right side
   11,315.49x = 180,716,893.23
5. Step 5: Solve for x
   x = 180,716,893.23/11,315.49
6. Step 6: Final answer
   x = 15,970.75