Finding the Fourth Proportional to 31,142.32, 42,976.24 and 16,995.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,142.32 : 42,976.24 = 16,995.18 : x
2. Step 2: Convert to fraction form
   31,142.32/42,976.24 = 16,995.18/x
3. Step 3: Cross multiply
   31,142.32x = 42,976.24 × 16,995.18
4. Step 4: Simplify right side
   31,142.32x = 730,388,934.52
5. Step 5: Solve for x
   x = 730,388,934.52/31,142.32
6. Step 6: Final answer
   x = 23,453.26