Finding the Fourth Proportional to 30,638.98, 42,275.23 and 17,886.38

Step by Step Solution

1. Step 1: Write the proportion equation
   30,638.98 : 42,275.23 = 17,886.38 : x
2. Step 2: Convert to fraction form
   30,638.98/42,275.23 = 17,886.38/x
3. Step 3: Cross multiply
   30,638.98x = 42,275.23 × 17,886.38
4. Step 4: Simplify right side
   30,638.98x = 756,150,616.99
5. Step 5: Solve for x
   x = 756,150,616.99/30,638.98
6. Step 6: Final answer
   x = 24,679.37