Finding the Fourth Proportional to 30,792.37, 42,493.86 and 18,689.35

Step by Step Solution

1. Step 1: Write the proportion equation
   30,792.37 : 42,493.86 = 18,689.35 : x
2. Step 2: Convert to fraction form
   30,792.37/42,493.86 = 18,689.35/x
3. Step 3: Cross multiply
   30,792.37x = 42,493.86 × 18,689.35
4. Step 4: Simplify right side
   30,792.37x = 794,182,469.43
5. Step 5: Solve for x
   x = 794,182,469.43/30,792.37
6. Step 6: Final answer
   x = 25,791.54