Finding the Third Proportional to 17,880 and 20,472

Step by Step Solution

1. Step 1: Write the proportion equation
   17,880 : 20,472 = 20,472 : x
2. Step 2: Convert to fraction form
   17,880/20,472 = 20,472/x
3. Step 3: Cross multiply
   17,880x = 20,472 × 20,472
4. Step 4: Simplify right side
   17,880x = 419,102,784
5. Step 5: Solve for x
   x = 419,102,784/17,880
6. Step 6: Final answer
   x = 23,439.75