Finding the Fourth Proportional to 21,597.34, 29,805.35 and 12,647.73

Step by Step Solution

1. Step 1: Write the proportion equation
   21,597.34 : 29,805.35 = 12,647.73 : x
2. Step 2: Convert to fraction form
   21,597.34/29,805.35 = 12,647.73/x
3. Step 3: Cross multiply
   21,597.34x = 29,805.35 × 12,647.73
4. Step 4: Simplify right side
   21,597.34x = 376,970,019.36
5. Step 5: Solve for x
   x = 376,970,019.36/21,597.34
6. Step 6: Final answer
   x = 17,454.47