Finding the Fourth Proportional to 11,982.72, 16,520.04 and 8,392.86

Step by Step Solution

1. Step 1: Write the proportion equation
   11,982.72 : 16,520.04 = 8,392.86 : x
2. Step 2: Convert to fraction form
   11,982.72/16,520.04 = 8,392.86/x
3. Step 3: Cross multiply
   11,982.72x = 16,520.04 × 8,392.86
4. Step 4: Simplify right side
   11,982.72x = 138,650,382.91
5. Step 5: Solve for x
   x = 138,650,382.91/11,982.72
6. Step 6: Final answer
   x = 11,570.86