Finding the Fourth Proportional to 31,134.16, 42,964.32 and 16,987.24

Step by Step Solution

1. Step 1: Write the proportion equation
   31,134.16 : 42,964.32 = 16,987.24 : x
2. Step 2: Convert to fraction form
   31,134.16/42,964.32 = 16,987.24/x
3. Step 3: Cross multiply
   31,134.16x = 42,964.32 × 16,987.24
4. Step 4: Simplify right side
   31,134.16x = 729,845,215.28
5. Step 5: Solve for x
   x = 729,845,215.28/31,134.16
6. Step 6: Final answer
   x = 23,441.94