Finding the Fourth Proportional to 30,912.55, 42,645.77 and 18,159.98

Step by Step Solution

1. Step 1: Write the proportion equation
   30,912.55 : 42,645.77 = 18,159.98 : x
2. Step 2: Convert to fraction form
   30,912.55/42,645.77 = 18,159.98/x
3. Step 3: Cross multiply
   30,912.55x = 42,645.77 × 18,159.98
4. Step 4: Simplify right side
   30,912.55x = 774,446,436.39
5. Step 5: Solve for x
   x = 774,446,436.39/30,912.55
6. Step 6: Final answer
   x = 25,052.81