Finding the Fourth Proportional to 40,342.72, 55,671.98 and 21,945.36

Step by Step Solution

1. Step 1: Write the proportion equation
   40,342.72 : 55,671.98 = 21,945.36 : x
2. Step 2: Convert to fraction form
   40,342.72/55,671.98 = 21,945.36/x
3. Step 3: Cross multiply
   40,342.72x = 55,671.98 × 21,945.36
4. Step 4: Simplify right side
   40,342.72x = 1,221,741,643.01
5. Step 5: Solve for x
   x = 1,221,741,643.01/40,342.72
6. Step 6: Final answer
   x = 30,284.07