Finding the Fourth Proportional to 31,142.32, 42,976.52 and 16,995.17

Step by Step Solution

1. Step 1: Write the proportion equation
   31,142.32 : 42,976.52 = 16,995.17 : x
2. Step 2: Convert to fraction form
   31,142.32/42,976.52 = 16,995.17/x
3. Step 3: Cross multiply
   31,142.32x = 42,976.52 × 16,995.17
4. Step 4: Simplify right side
   31,142.32x = 730,393,203.46
5. Step 5: Solve for x
   x = 730,393,203.46/31,142.32
6. Step 6: Final answer
   x = 23,453.39