Finding the Fourth Proportional to 30,571.97, 42,196.82 and 18,641.88

Step by Step Solution

1. Step 1: Write the proportion equation
   30,571.97 : 42,196.82 = 18,641.88 : x
2. Step 2: Convert to fraction form
   30,571.97/42,196.82 = 18,641.88/x
3. Step 3: Cross multiply
   30,571.97x = 42,196.82 × 18,641.88
4. Step 4: Simplify right side
   30,571.97x = 786,627,961.61
5. Step 5: Solve for x
   x = 786,627,961.61/30,571.97
6. Step 6: Final answer
   x = 25,730.37