Finding the Fourth Proportional to 2,121.28, 3,181.98 and 1,196.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,121.28 : 3,181.98 = 1,196.68 : x
2. Step 2: Convert to fraction form
   2,121.28/3,181.98 = 1,196.68/x
3. Step 3: Cross multiply
   2,121.28x = 3,181.98 × 1,196.68
4. Step 4: Simplify right side
   2,121.28x = 3,807,811.83
5. Step 5: Solve for x
   x = 3,807,811.83/2,121.28
6. Step 6: Final answer
   x = 1,795.05