Finding the Fourth Proportional to 30,991.50, 42,762.98 and 17,559.98

Step by Step Solution

1. Step 1: Write the proportion equation
   30,991.50 : 42,762.98 = 17,559.98 : x
2. Step 2: Convert to fraction form
   30,991.50/42,762.98 = 17,559.98/x
3. Step 3: Cross multiply
   30,991.50x = 42,762.98 × 17,559.98
4. Step 4: Simplify right side
   30,991.50x = 750,917,073.54
5. Step 5: Solve for x
   x = 750,917,073.54/30,991.50
6. Step 6: Final answer
   x = 24,229.78