Finding the Fourth Proportional to 1,411.38, 1,945.62 and 1,211.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.38 : 1,945.62 = 1,211.31 : x
2. Step 2: Convert to fraction form
   1,411.38/1,945.62 = 1,211.31/x
3. Step 3: Cross multiply
   1,411.38x = 1,945.62 × 1,211.31
4. Step 4: Simplify right side
   1,411.38x = 2,356,742.26
5. Step 5: Solve for x
   x = 2,356,742.26/1,411.38
6. Step 6: Final answer
   x = 1,669.81