Finding the Fourth Proportional to 30,991.04, 42,768.18 and 17,561.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,991.04 : 42,768.18 = 17,561.96 : x
2. Step 2: Convert to fraction form
   30,991.04/42,768.18 = 17,561.96/x
3. Step 3: Cross multiply
   30,991.04x = 42,768.18 × 17,561.96
4. Step 4: Simplify right side
   30,991.04x = 751,093,066.43
5. Step 5: Solve for x
   x = 751,093,066.43/30,991.04
6. Step 6: Final answer
   x = 24,235.81