Finding the Fourth Proportional to 30,878.26, 42,611.82 and 17,449.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,878.26 : 42,611.82 = 17,449.72 : x
2. Step 2: Convert to fraction form
   30,878.26/42,611.82 = 17,449.72/x
3. Step 3: Cross multiply
   30,878.26x = 42,611.82 × 17,449.72
4. Step 4: Simplify right side
   30,878.26x = 743,564,327.69
5. Step 5: Solve for x
   x = 743,564,327.69/30,878.26
6. Step 6: Final answer
   x = 24,080.51