Finding the Third Proportional to 3,409.59 and 3,721.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,409.59 : 3,721.78 = 3,721.78 : x
2. Step 2: Convert to fraction form
   3,409.59/3,721.78 = 3,721.78/x
3. Step 3: Cross multiply
   3,409.59x = 3,721.78 × 3,721.78
4. Step 4: Simplify right side
   3,409.59x = 13,851,655.67
5. Step 5: Solve for x
   x = 13,851,655.67/3,409.59
6. Step 6: Final answer
   x = 4,062.55