Finding the Third Proportional to 1,823.77 and 3,987.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,823.77 : 3,987.98 = 3,987.98 : x
2. Step 2: Convert to fraction form
   1,823.77/3,987.98 = 3,987.98/x
3. Step 3: Cross multiply
   1,823.77x = 3,987.98 × 3,987.98
4. Step 4: Simplify right side
   1,823.77x = 15,904,019.38
5. Step 5: Solve for x
   x = 15,904,019.38/1,823.77
6. Step 6: Final answer
   x = 8,720.43