Finding the Fourth Proportional to 40,012.78, 55,218.06 and 22,107.34

Step by Step Solution

1. Step 1: Write the proportion equation
   40,012.78 : 55,218.06 = 22,107.34 : x
2. Step 2: Convert to fraction form
   40,012.78/55,218.06 = 22,107.34/x
3. Step 3: Cross multiply
   40,012.78x = 55,218.06 × 22,107.34
4. Step 4: Simplify right side
   40,012.78x = 1,220,724,426.56
5. Step 5: Solve for x
   x = 1,220,724,426.56/40,012.78
6. Step 6: Final answer
   x = 30,508.36