Finding the Fourth Proportional to 30,985.49, 42,759.86 and 17,559.30

Step by Step Solution

1. Step 1: Write the proportion equation
   30,985.49 : 42,759.86 = 17,559.30 : x
2. Step 2: Convert to fraction form
   30,985.49/42,759.86 = 17,559.30/x
3. Step 3: Cross multiply
   30,985.49x = 42,759.86 × 17,559.30
4. Step 4: Simplify right side
   30,985.49x = 750,833,348.10
5. Step 5: Solve for x
   x = 750,833,348.10/30,985.49
6. Step 6: Final answer
   x = 24,231.77