Finding the Fourth Proportional to 30,811.12, 42,515.69 and 17,381.59

Step by Step Solution

1. Step 1: Write the proportion equation
   30,811.12 : 42,515.69 = 17,381.59 : x
2. Step 2: Convert to fraction form
   30,811.12/42,515.69 = 17,381.59/x
3. Step 3: Cross multiply
   30,811.12x = 42,515.69 × 17,381.59
4. Step 4: Simplify right side
   30,811.12x = 738,990,098.95
5. Step 5: Solve for x
   x = 738,990,098.95/30,811.12
6. Step 6: Final answer
   x = 23,984.53