Finding the Fourth Proportional to 12,128.72, 16,737.59 and 6,823.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,128.72 : 16,737.59 = 6,823.53 : x
2. Step 2: Convert to fraction form
   12,128.72/16,737.59 = 6,823.53/x
3. Step 3: Cross multiply
   12,128.72x = 16,737.59 × 6,823.53
4. Step 4: Simplify right side
   12,128.72x = 114,209,464.55
5. Step 5: Solve for x
   x = 114,209,464.55/12,128.72
6. Step 6: Final answer
   x = 9,416.45