Finding the Fourth Proportional to 31,133.58, 42,964.32 and 16,986.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,133.58 : 42,964.32 = 16,986.42 : x
2. Step 2: Convert to fraction form
   31,133.58/42,964.32 = 16,986.42/x
3. Step 3: Cross multiply
   31,133.58x = 42,964.32 × 16,986.42
4. Step 4: Simplify right side
   31,133.58x = 729,809,984.53
5. Step 5: Solve for x
   x = 729,809,984.53/31,133.58
6. Step 6: Final answer
   x = 23,441.25