Finding the Third Proportional to 5,322.80 and 7,999.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,322.80 : 7,999.42 = 7,999.42 : x
2. Step 2: Convert to fraction form
   5,322.80/7,999.42 = 7,999.42/x
3. Step 3: Cross multiply
   5,322.80x = 7,999.42 × 7,999.42
4. Step 4: Simplify right side
   5,322.80x = 63,990,758.15
5. Step 5: Solve for x
   x = 63,990,758.15/5,322.80
6. Step 6: Final answer
   x = 12,022.00