Finding the Fourth Proportional to 30,639.09, 42,275.39 and 17,886.49

Step by Step Solution

1. Step 1: Write the proportion equation
   30,639.09 : 42,275.39 = 17,886.49 : x
2. Step 2: Convert to fraction form
   30,639.09/42,275.39 = 17,886.49/x
3. Step 3: Cross multiply
   30,639.09x = 42,275.39 × 17,886.49
4. Step 4: Simplify right side
   30,639.09x = 756,158,039.67
5. Step 5: Solve for x
   x = 756,158,039.67/30,639.09
6. Step 6: Final answer
   x = 24,679.52