Finding the Fourth Proportional to 30,996.72, 42,776.28 and 18,250.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,996.72 : 42,776.28 = 18,250.56 : x
2. Step 2: Convert to fraction form
   30,996.72/42,776.28 = 18,250.56/x
3. Step 3: Cross multiply
   30,996.72x = 42,776.28 × 18,250.56
4. Step 4: Simplify right side
   30,996.72x = 780,691,064.72
5. Step 5: Solve for x
   x = 780,691,064.72/30,996.72
6. Step 6: Final answer
   x = 25,186.25