Finding the Fourth Proportional to 31,145.75, 42,982.32 and 17,718.23

Step by Step Solution

1. Step 1: Write the proportion equation
   31,145.75 : 42,982.32 = 17,718.23 : x
2. Step 2: Convert to fraction form
   31,145.75/42,982.32 = 17,718.23/x
3. Step 3: Cross multiply
   31,145.75x = 42,982.32 × 17,718.23
4. Step 4: Simplify right side
   31,145.75x = 761,570,631.69
5. Step 5: Solve for x
   x = 761,570,631.69/31,145.75
6. Step 6: Final answer
   x = 24,451.83