Finding the Fourth Proportional to 31,144.08, 42,979.78 and 17,717.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,144.08 : 42,979.78 = 17,717.28 : x
2. Step 2: Convert to fraction form
   31,144.08/42,979.78 = 17,717.28/x
3. Step 3: Cross multiply
   31,144.08x = 42,979.78 × 17,717.28
4. Step 4: Simplify right side
   31,144.08x = 761,484,796.60
5. Step 5: Solve for x
   x = 761,484,796.60/31,144.08
6. Step 6: Final answer
   x = 24,450.39