Finding the Fourth Proportional to 42,921.24, 64,410.42 and 17,641.49

Step by Step Solution

1. Step 1: Write the proportion equation
   42,921.24 : 64,410.42 = 17,641.49 : x
2. Step 2: Convert to fraction form
   42,921.24/64,410.42 = 17,641.49/x
3. Step 3: Cross multiply
   42,921.24x = 64,410.42 × 17,641.49
4. Step 4: Simplify right side
   42,921.24x = 1,136,295,458.27
5. Step 5: Solve for x
   x = 1,136,295,458.27/42,921.24
6. Step 6: Final answer
   x = 26,473.97