Finding the Fourth Proportional to 30,760.47, 42,434.42 and 18,013.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,760.47 : 42,434.42 = 18,013.91 : x
2. Step 2: Convert to fraction form
   30,760.47/42,434.42 = 18,013.91/x
3. Step 3: Cross multiply
   30,760.47x = 42,434.42 × 18,013.91
4. Step 4: Simplify right side
   30,760.47x = 764,409,520.54
5. Step 5: Solve for x
   x = 764,409,520.54/30,760.47
6. Step 6: Final answer
   x = 24,850.38