Finding the Fourth Proportional to 2,099.16, 3,147.71 and 1,221.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.16 : 3,147.71 = 1,221.96 : x
2. Step 2: Convert to fraction form
   2,099.16/3,147.71 = 1,221.96/x
3. Step 3: Cross multiply
   2,099.16x = 3,147.71 × 1,221.96
4. Step 4: Simplify right side
   2,099.16x = 3,846,369.60
5. Step 5: Solve for x
   x = 3,846,369.60/2,099.16
6. Step 6: Final answer
   x = 1,832.34