Finding the Fourth Proportional to 30,520.94, 42,119.60 and 17,091.54

Step by Step Solution

1. Step 1: Write the proportion equation
   30,520.94 : 42,119.60 = 17,091.54 : x
2. Step 2: Convert to fraction form
   30,520.94/42,119.60 = 17,091.54/x
3. Step 3: Cross multiply
   30,520.94x = 42,119.60 × 17,091.54
4. Step 4: Simplify right side
   30,520.94x = 719,888,742.73
5. Step 5: Solve for x
   x = 719,888,742.73/30,520.94
6. Step 6: Final answer
   x = 23,586.72