Finding the Fourth Proportional to 2,645.42, 3,965.12 and 1,083.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.42 : 3,965.12 = 1,083.42 : x
2. Step 2: Convert to fraction form
   2,645.42/3,965.12 = 1,083.42/x
3. Step 3: Cross multiply
   2,645.42x = 3,965.12 × 1,083.42
4. Step 4: Simplify right side
   2,645.42x = 4,295,877.80
5. Step 5: Solve for x
   x = 4,295,877.80/2,645.42
6. Step 6: Final answer
   x = 1,623.89