Finding the Fourth Proportional to 21,994.46, 30,351.98 and 12,434.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,994.46 : 30,351.98 = 12,434.20 : x
2. Step 2: Convert to fraction form
   21,994.46/30,351.98 = 12,434.20/x
3. Step 3: Cross multiply
   21,994.46x = 30,351.98 × 12,434.20
4. Step 4: Simplify right side
   21,994.46x = 377,402,589.72
5. Step 5: Solve for x
   x = 377,402,589.72/21,994.46
6. Step 6: Final answer
   x = 17,158.98