Finding the Fourth Proportional to 30,515.52, 42,109.71 and 17,086.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,515.52 : 42,109.71 = 17,086.56 : x
2. Step 2: Convert to fraction form
   30,515.52/42,109.71 = 17,086.56/x
3. Step 3: Cross multiply
   30,515.52x = 42,109.71 × 17,086.56
4. Step 4: Simplify right side
   30,515.52x = 719,510,086.50
5. Step 5: Solve for x
   x = 719,510,086.50/30,515.52
6. Step 6: Final answer
   x = 23,578.50