Finding the Fourth Proportional to 40,144.05, 55,398.76 and 21,994.79

Step by Step Solution

1. Step 1: Write the proportion equation
   40,144.05 : 55,398.76 = 21,994.79 : x
2. Step 2: Convert to fraction form
   40,144.05/55,398.76 = 21,994.79/x
3. Step 3: Cross multiply
   40,144.05x = 55,398.76 × 21,994.79
4. Step 4: Simplify right side
   40,144.05x = 1,218,483,760.48
5. Step 5: Solve for x
   x = 1,218,483,760.48/40,144.05
6. Step 6: Final answer
   x = 30,352.79