Finding the Fourth Proportional to 11,761.68, 17,619.80 and 8,055.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,761.68 : 17,619.80 = 8,055.12 : x
2. Step 2: Convert to fraction form
   11,761.68/17,619.80 = 8,055.12/x
3. Step 3: Cross multiply
   11,761.68x = 17,619.80 × 8,055.12
4. Step 4: Simplify right side
   11,761.68x = 141,929,603.38
5. Step 5: Solve for x
   x = 141,929,603.38/11,761.68
6. Step 6: Final answer
   x = 12,067.12