Finding the Fourth Proportional to 3,456.38, 5,180.46 and 1,992.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,456.38 : 5,180.46 = 1,992.50 : x
2. Step 2: Convert to fraction form
   3,456.38/5,180.46 = 1,992.50/x
3. Step 3: Cross multiply
   3,456.38x = 5,180.46 × 1,992.50
4. Step 4: Simplify right side
   3,456.38x = 10,322,066.55
5. Step 5: Solve for x
   x = 10,322,066.55/3,456.38
6. Step 6: Final answer
   x = 2,986.38