Finding the Third Proportional to 3,521 and 7,401.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,521 : 7,401.50 = 7,401.50 : x
2. Step 2: Convert to fraction form
   3,521/7,401.50 = 7,401.50/x
3. Step 3: Cross multiply
   3,521x = 7,401.50 × 7,401.50
4. Step 4: Simplify right side
   3,521x = 54,782,202.25
5. Step 5: Solve for x
   x = 54,782,202.25/3,521
6. Step 6: Final answer
   x = 15,558.71