Finding the Fourth Proportional to 21,629.58, 29,848.17 and 12,069.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,629.58 : 29,848.17 = 12,069.72 : x
2. Step 2: Convert to fraction form
   21,629.58/29,848.17 = 12,069.72/x
3. Step 3: Cross multiply
   21,629.58x = 29,848.17 × 12,069.72
4. Step 4: Simplify right side
   21,629.58x = 360,259,054.41
5. Step 5: Solve for x
   x = 360,259,054.41/21,629.58
6. Step 6: Final answer
   x = 16,655.85