Finding the Fourth Proportional to 2,162.05, 3,240.56 and 992.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.05 : 3,240.56 = 992.18 : x
2. Step 2: Convert to fraction form
   2,162.05/3,240.56 = 992.18/x
3. Step 3: Cross multiply
   2,162.05x = 3,240.56 × 992.18
4. Step 4: Simplify right side
   2,162.05x = 3,215,221.70
5. Step 5: Solve for x
   x = 3,215,221.70/2,162.05
6. Step 6: Final answer
   x = 1,487.11