Finding the Fourth Proportional to 31,142.16, 42,976.12 and 16,995.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,142.16 : 42,976.12 = 16,995.12 : x
2. Step 2: Convert to fraction form
   31,142.16/42,976.12 = 16,995.12/x
3. Step 3: Cross multiply
   31,142.16x = 42,976.12 × 16,995.12
4. Step 4: Simplify right side
   31,142.16x = 730,384,316.53
5. Step 5: Solve for x
   x = 730,384,316.53/31,142.16
6. Step 6: Final answer
   x = 23,453.23