Finding the Fourth Proportional to 30,719.94, 42,400.17 and 18,146.58

Step by Step Solution

1. Step 1: Write the proportion equation
   30,719.94 : 42,400.17 = 18,146.58 : x
2. Step 2: Convert to fraction form
   30,719.94/42,400.17 = 18,146.58/x
3. Step 3: Cross multiply
   30,719.94x = 42,400.17 × 18,146.58
4. Step 4: Simplify right side
   30,719.94x = 769,418,076.92
5. Step 5: Solve for x
   x = 769,418,076.92/30,719.94
6. Step 6: Final answer
   x = 25,046.21