Finding the Fourth Proportional to 11,815.56, 17,724.96 and 5,241.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,815.56 : 17,724.96 = 5,241.60 : x
2. Step 2: Convert to fraction form
   11,815.56/17,724.96 = 5,241.60/x
3. Step 3: Cross multiply
   11,815.56x = 17,724.96 × 5,241.60
4. Step 4: Simplify right side
   11,815.56x = 92,907,150.34
5. Step 5: Solve for x
   x = 92,907,150.34/11,815.56
6. Step 6: Final answer
   x = 7,863.12