Finding the Fourth Proportional to 11,767.86, 17,642.52 and 8,058.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,767.86 : 17,642.52 = 8,058.78 : x
2. Step 2: Convert to fraction form
   11,767.86/17,642.52 = 8,058.78/x
3. Step 3: Cross multiply
   11,767.86x = 17,642.52 × 8,058.78
4. Step 4: Simplify right side
   11,767.86x = 142,177,187.33
5. Step 5: Solve for x
   x = 142,177,187.33/11,767.86
6. Step 6: Final answer
   x = 12,081.82