Finding the Third Proportional to 2,211.50 and 3,520

Step by Step Solution

1. Step 1: Write the proportion equation
   2,211.50 : 3,520 = 3,520 : x
2. Step 2: Convert to fraction form
   2,211.50/3,520 = 3,520/x
3. Step 3: Cross multiply
   2,211.50x = 3,520 × 3,520
4. Step 4: Simplify right side
   2,211.50x = 12,390,400
5. Step 5: Solve for x
   x = 12,390,400/2,211.50
6. Step 6: Final answer
   x = 5,602.71