Finding the Fourth Proportional to 2,665.37, 3,992.86 and 1,622.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.37 : 3,992.86 = 1,622.79 : x
2. Step 2: Convert to fraction form
   2,665.37/3,992.86 = 1,622.79/x
3. Step 3: Cross multiply
   2,665.37x = 3,992.86 × 1,622.79
4. Step 4: Simplify right side
   2,665.37x = 6,479,554.25
5. Step 5: Solve for x
   x = 6,479,554.25/2,665.37
6. Step 6: Final answer
   x = 2,431.02