Finding the Fourth Proportional to 21,633.03, 29,853.72 and 12,680.73

Step by Step Solution

1. Step 1: Write the proportion equation
   21,633.03 : 29,853.72 = 12,680.73 : x
2. Step 2: Convert to fraction form
   21,633.03/29,853.72 = 12,680.73/x
3. Step 3: Cross multiply
   21,633.03x = 29,853.72 × 12,680.73
4. Step 4: Simplify right side
   21,633.03x = 378,566,962.82
5. Step 5: Solve for x
   x = 378,566,962.82/21,633.03
6. Step 6: Final answer
   x = 17,499.49