Finding the Third Proportional to 2,490.25 and 3,729.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.25 : 3,729.50 = 3,729.50 : x
2. Step 2: Convert to fraction form
   2,490.25/3,729.50 = 3,729.50/x
3. Step 3: Cross multiply
   2,490.25x = 3,729.50 × 3,729.50
4. Step 4: Simplify right side
   2,490.25x = 13,909,170.25
5. Step 5: Solve for x
   x = 13,909,170.25/2,490.25
6. Step 6: Final answer
   x = 5,585.45