Finding the Third Proportional to 1,821.23 and 3,615.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,821.23 : 3,615.89 = 3,615.89 : x
2. Step 2: Convert to fraction form
   1,821.23/3,615.89 = 3,615.89/x
3. Step 3: Cross multiply
   1,821.23x = 3,615.89 × 3,615.89
4. Step 4: Simplify right side
   1,821.23x = 13,074,665.01
5. Step 5: Solve for x
   x = 13,074,665.01/1,821.23
6. Step 6: Final answer
   x = 7,179.01