Finding the Fourth Proportional to 42,944.24, 64,436.72 and 20,745.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,944.24 : 64,436.72 = 20,745.18 : x
2. Step 2: Convert to fraction form
   42,944.24/64,436.72 = 20,745.18/x
3. Step 3: Cross multiply
   42,944.24x = 64,436.72 × 20,745.18
4. Step 4: Simplify right side
   42,944.24x = 1,336,751,251.28
5. Step 5: Solve for x
   x = 1,336,751,251.28/42,944.24
6. Step 6: Final answer
   x = 31,127.60