Finding the Fourth Proportional to 11,443.08, 15,779.82 and 7,665.66

Step by Step Solution

1. Step 1: Write the proportion equation
   11,443.08 : 15,779.82 = 7,665.66 : x
2. Step 2: Convert to fraction form
   11,443.08/15,779.82 = 7,665.66/x
3. Step 3: Cross multiply
   11,443.08x = 15,779.82 × 7,665.66
4. Step 4: Simplify right side
   11,443.08x = 120,962,734.98
5. Step 5: Solve for x
   x = 120,962,734.98/11,443.08
6. Step 6: Final answer
   x = 10,570.82