Finding the Fourth Proportional to 2,231.92, 3,346.32 and 998.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.92 : 3,346.32 = 998.72 : x
2. Step 2: Convert to fraction form
   2,231.92/3,346.32 = 998.72/x
3. Step 3: Cross multiply
   2,231.92x = 3,346.32 × 998.72
4. Step 4: Simplify right side
   2,231.92x = 3,342,036.71
5. Step 5: Solve for x
   x = 3,342,036.71/2,231.92
6. Step 6: Final answer
   x = 1,497.38