Finding the Fourth Proportional to 16,728.61, 23,085.48 and 9,276.61

Step by Step Solution

1. Step 1: Write the proportion equation
   16,728.61 : 23,085.48 = 9,276.61 : x
2. Step 2: Convert to fraction form
   16,728.61/23,085.48 = 9,276.61/x
3. Step 3: Cross multiply
   16,728.61x = 23,085.48 × 9,276.61
4. Step 4: Simplify right side
   16,728.61x = 214,154,988.89
5. Step 5: Solve for x
   x = 214,154,988.89/16,728.61
6. Step 6: Final answer
   x = 12,801.72