Finding the Fourth Proportional to 11,641.76, 16,054.56 and 7,661.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,641.76 : 16,054.56 = 7,661.12 : x
2. Step 2: Convert to fraction form
   11,641.76/16,054.56 = 7,661.12/x
3. Step 3: Cross multiply
   11,641.76x = 16,054.56 × 7,661.12
4. Step 4: Simplify right side
   11,641.76x = 122,995,910.71
5. Step 5: Solve for x
   x = 122,995,910.71/11,641.76
6. Step 6: Final answer
   x = 10,565.06