Finding the Fourth Proportional to 30,571.81, 42,191.27 and 16,964.31

Step by Step Solution

1. Step 1: Write the proportion equation
   30,571.81 : 42,191.27 = 16,964.31 : x
2. Step 2: Convert to fraction form
   30,571.81/42,191.27 = 16,964.31/x
3. Step 3: Cross multiply
   30,571.81x = 42,191.27 × 16,964.31
4. Step 4: Simplify right side
   30,571.81x = 715,745,783.57
5. Step 5: Solve for x
   x = 715,745,783.57/30,571.81
6. Step 6: Final answer
   x = 23,411.95