Finding the Fourth Proportional to 30,495.15, 42,087.72 and 17,571.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,495.15 : 42,087.72 = 17,571.91 : x
2. Step 2: Convert to fraction form
   30,495.15/42,087.72 = 17,571.91/x
3. Step 3: Cross multiply
   30,495.15x = 42,087.72 × 17,571.91
4. Step 4: Simplify right side
   30,495.15x = 739,561,627.95
5. Step 5: Solve for x
   x = 739,561,627.95/30,495.15
6. Step 6: Final answer
   x = 24,251.78