Finding the Third Proportional to 4,099.99 and 8,783.23

Step by Step Solution

1. Step 1: Write the proportion equation
   4,099.99 : 8,783.23 = 8,783.23 : x
2. Step 2: Convert to fraction form
   4,099.99/8,783.23 = 8,783.23/x
3. Step 3: Cross multiply
   4,099.99x = 8,783.23 × 8,783.23
4. Step 4: Simplify right side
   4,099.99x = 77,145,068.85
5. Step 5: Solve for x
   x = 77,145,068.85/4,099.99
6. Step 6: Final answer
   x = 18,815.91