Finding the Fourth Proportional to 40,109.07, 55,351.18 and 21,959.49

Step by Step Solution

1. Step 1: Write the proportion equation
   40,109.07 : 55,351.18 = 21,959.49 : x
2. Step 2: Convert to fraction form
   40,109.07/55,351.18 = 21,959.49/x
3. Step 3: Cross multiply
   40,109.07x = 55,351.18 × 21,959.49
4. Step 4: Simplify right side
   40,109.07x = 1,215,483,628.80
5. Step 5: Solve for x
   x = 1,215,483,628.80/40,109.07
6. Step 6: Final answer
   x = 30,304.46