Finding the Fourth Proportional to 11,333.80, 15,636.28 and 8,356.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,333.80 : 15,636.28 = 8,356.72 : x
2. Step 2: Convert to fraction form
   11,333.80/15,636.28 = 8,356.72/x
3. Step 3: Cross multiply
   11,333.80x = 15,636.28 × 8,356.72
4. Step 4: Simplify right side
   11,333.80x = 130,668,013.80
5. Step 5: Solve for x
   x = 130,668,013.80/11,333.80
6. Step 6: Final answer
   x = 11,529.06