Finding the Fourth Proportional to 30,934.27, 42,686.67 and 18,187.89

Step by Step Solution

1. Step 1: Write the proportion equation
   30,934.27 : 42,686.67 = 18,187.89 : x
2. Step 2: Convert to fraction form
   30,934.27/42,686.67 = 18,187.89/x
3. Step 3: Cross multiply
   30,934.27x = 42,686.67 × 18,187.89
4. Step 4: Simplify right side
   30,934.27x = 776,380,458.43
5. Step 5: Solve for x
   x = 776,380,458.43/30,934.27
6. Step 6: Final answer
   x = 25,097.75