Finding the Fourth Proportional to 1,321.83, 1,969.82 and 1,243.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321.83 : 1,969.82 = 1,243.94 : x
2. Step 2: Convert to fraction form
   1,321.83/1,969.82 = 1,243.94/x
3. Step 3: Cross multiply
   1,321.83x = 1,969.82 × 1,243.94
4. Step 4: Simplify right side
   1,321.83x = 2,450,337.89
5. Step 5: Solve for x
   x = 2,450,337.89/1,321.83
6. Step 6: Final answer
   x = 1,853.75