Finding the Fourth Proportional to 30,985.61, 42,757.70 and 17,558.96

Step by Step Solution

1. Step 1: Write the proportion equation
   30,985.61 : 42,757.70 = 17,558.96 : x
2. Step 2: Convert to fraction form
   30,985.61/42,757.70 = 17,558.96/x
3. Step 3: Cross multiply
   30,985.61x = 42,757.70 × 17,558.96
4. Step 4: Simplify right side
   30,985.61x = 750,780,894.78
5. Step 5: Solve for x
   x = 750,780,894.78/30,985.61
6. Step 6: Final answer
   x = 24,229.99