Finding the Fourth Proportional to 30,515.40, 42,067.89 and 22,434.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,515.40 : 42,067.89 = 22,434.78 : x
2. Step 2: Convert to fraction form
   30,515.40/42,067.89 = 22,434.78/x
3. Step 3: Cross multiply
   30,515.40x = 42,067.89 × 22,434.78
4. Step 4: Simplify right side
   30,515.40x = 943,783,857.21
5. Step 5: Solve for x
   x = 943,783,857.21/30,515.40
6. Step 6: Final answer
   x = 30,928.12