Finding the Fourth Proportional to 30,538.81, 42,123 and 17,963.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,538.81 : 42,123 = 17,963.56 : x
2. Step 2: Convert to fraction form
   30,538.81/42,123 = 17,963.56/x
3. Step 3: Cross multiply
   30,538.81x = 42,123 × 17,963.56
4. Step 4: Simplify right side
   30,538.81x = 756,679,037.88
5. Step 5: Solve for x
   x = 756,679,037.88/30,538.81
6. Step 6: Final answer
   x = 24,777.62