Finding the Fourth Proportional to 30,986.03, 42,764.37 and 18,410.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,986.03 : 42,764.37 = 18,410.78 : x
2. Step 2: Convert to fraction form
   30,986.03/42,764.37 = 18,410.78/x
3. Step 3: Cross multiply
   30,986.03x = 42,764.37 × 18,410.78
4. Step 4: Simplify right side
   30,986.03x = 787,325,407.91
5. Step 5: Solve for x
   x = 787,325,407.91/30,986.03
6. Step 6: Final answer
   x = 25,409.04