Finding the Fourth Proportional to 11,379.96, 15,679.98 and 7,647.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,379.96 : 15,679.98 = 7,647.48 : x
2. Step 2: Convert to fraction form
   11,379.96/15,679.98 = 7,647.48/x
3. Step 3: Cross multiply
   11,379.96x = 15,679.98 × 7,647.48
4. Step 4: Simplify right side
   11,379.96x = 119,912,333.45
5. Step 5: Solve for x
   x = 119,912,333.45/11,379.96
6. Step 6: Final answer
   x = 10,537.15