Finding the Fourth Proportional to 21,995.41, 30,346.53 and 12,434.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,995.41 : 30,346.53 = 12,434.37 : x
2. Step 2: Convert to fraction form
   21,995.41/30,346.53 = 12,434.37/x
3. Step 3: Cross multiply
   21,995.41x = 30,346.53 × 12,434.37
4. Step 4: Simplify right side
   21,995.41x = 377,339,935.61
5. Step 5: Solve for x
   x = 377,339,935.61/21,995.41
6. Step 6: Final answer
   x = 17,155.40