Finding the Fourth Proportional to 21,994.88, 30,354.12 and 12,565.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,994.88 : 30,354.12 = 12,565.28 : x
2. Step 2: Convert to fraction form
   21,994.88/30,354.12 = 12,565.28/x
3. Step 3: Cross multiply
   21,994.88x = 30,354.12 × 12,565.28
4. Step 4: Simplify right side
   21,994.88x = 381,408,016.95
5. Step 5: Solve for x
   x = 381,408,016.95/21,994.88
6. Step 6: Final answer
   x = 17,340.76