Finding the Fourth Proportional to 30,891.72, 42,608.07 and 19,563.06

Step by Step Solution

1. Step 1: Write the proportion equation
   30,891.72 : 42,608.07 = 19,563.06 : x
2. Step 2: Convert to fraction form
   30,891.72/42,608.07 = 19,563.06/x
3. Step 3: Cross multiply
   30,891.72x = 42,608.07 × 19,563.06
4. Step 4: Simplify right side
   30,891.72x = 833,544,229.89
5. Step 5: Solve for x
   x = 833,544,229.89/30,891.72
6. Step 6: Final answer
   x = 26,982.77