Finding the Third Proportional to 11,120 and 17,880

Step by Step Solution

1. Step 1: Write the proportion equation
   11,120 : 17,880 = 17,880 : x
2. Step 2: Convert to fraction form
   11,120/17,880 = 17,880/x
3. Step 3: Cross multiply
   11,120x = 17,880 × 17,880
4. Step 4: Simplify right side
   11,120x = 319,694,400
5. Step 5: Solve for x
   x = 319,694,400/11,120
6. Step 6: Final answer
   x = 28,749.50