Finding the Fourth Proportional to 30,690.18, 42,359.55 and 17,949.30

Step by Step Solution

1. Step 1: Write the proportion equation
   30,690.18 : 42,359.55 = 17,949.30 : x
2. Step 2: Convert to fraction form
   30,690.18/42,359.55 = 17,949.30/x
3. Step 3: Cross multiply
   30,690.18x = 42,359.55 × 17,949.30
4. Step 4: Simplify right side
   30,690.18x = 760,324,270.82
5. Step 5: Solve for x
   x = 760,324,270.82/30,690.18
6. Step 6: Final answer
   x = 24,774.19