Finding the Fourth Proportional to 11,886.92, 17,823.72 and 8,142.94

Step by Step Solution

1. Step 1: Write the proportion equation
   11,886.92 : 17,823.72 = 8,142.94 : x
2. Step 2: Convert to fraction form
   11,886.92/17,823.72 = 8,142.94/x
3. Step 3: Cross multiply
   11,886.92x = 17,823.72 × 8,142.94
4. Step 4: Simplify right side
   11,886.92x = 145,137,424.72
5. Step 5: Solve for x
   x = 145,137,424.72/11,886.92
6. Step 6: Final answer
   x = 12,209.84