Finding the Fourth Proportional to 12,321.72, 16,986.90 and 8,336.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,321.72 : 16,986.90 = 8,336.52 : x
2. Step 2: Convert to fraction form
   12,321.72/16,986.90 = 8,336.52/x
3. Step 3: Cross multiply
   12,321.72x = 16,986.90 × 8,336.52
4. Step 4: Simplify right side
   12,321.72x = 141,611,631.59
5. Step 5: Solve for x
   x = 141,611,631.59/12,321.72
6. Step 6: Final answer
   x = 11,492.85