Finding the Third Proportional to 17,720 and 28,200

Step by Step Solution

1. Step 1: Write the proportion equation
   17,720 : 28,200 = 28,200 : x
2. Step 2: Convert to fraction form
   17,720/28,200 = 28,200/x
3. Step 3: Cross multiply
   17,720x = 28,200 × 28,200
4. Step 4: Simplify right side
   17,720x = 795,240,000
5. Step 5: Solve for x
   x = 795,240,000/17,720
6. Step 6: Final answer
   x = 44,878.10