Finding the Third Proportional to 3,490 and 3,730

Step by Step Solution

1. Step 1: Write the proportion equation
   3,490 : 3,730 = 3,730 : x
2. Step 2: Convert to fraction form
   3,490/3,730 = 3,730/x
3. Step 3: Cross multiply
   3,490x = 3,730 × 3,730
4. Step 4: Simplify right side
   3,490x = 13,912,900
5. Step 5: Solve for x
   x = 13,912,900/3,490
6. Step 6: Final answer
   x = 3,986.50