Finding the Fourth Proportional to 1,411.05, 1,945.97 and 1,211.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.05 : 1,945.97 = 1,211.82 : x
2. Step 2: Convert to fraction form
   1,411.05/1,945.97 = 1,211.82/x
3. Step 3: Cross multiply
   1,411.05x = 1,945.97 × 1,211.82
4. Step 4: Simplify right side
   1,411.05x = 2,358,159.31
5. Step 5: Solve for x
   x = 2,358,159.31/1,411.05
6. Step 6: Final answer
   x = 1,671.21