Finding the Fourth Proportional to 21,754.47, 30,019.29 and 12,064.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,754.47 : 30,019.29 = 12,064.20 : x
2. Step 2: Convert to fraction form
   21,754.47/30,019.29 = 12,064.20/x
3. Step 3: Cross multiply
   21,754.47x = 30,019.29 × 12,064.20
4. Step 4: Simplify right side
   21,754.47x = 362,158,718.42
5. Step 5: Solve for x
   x = 362,158,718.42/21,754.47
6. Step 6: Final answer
   x = 16,647.55