Finding the Fourth Proportional to 11,356.56, 17,015.28 and 8,862.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,356.56 : 17,015.28 = 8,862.72 : x
2. Step 2: Convert to fraction form
   11,356.56/17,015.28 = 8,862.72/x
3. Step 3: Cross multiply
   11,356.56x = 17,015.28 × 8,862.72
4. Step 4: Simplify right side
   11,356.56x = 150,801,662.36
5. Step 5: Solve for x
   x = 150,801,662.36/11,356.56
6. Step 6: Final answer
   x = 13,278.82