Finding the Fourth Proportional to 1,869.72, 2,580.78 and 1,083.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,869.72 : 2,580.78 = 1,083.96 : x
2. Step 2: Convert to fraction form
   1,869.72/2,580.78 = 1,083.96/x
3. Step 3: Cross multiply
   1,869.72x = 2,580.78 × 1,083.96
4. Step 4: Simplify right side
   1,869.72x = 2,797,462.29
5. Step 5: Solve for x
   x = 2,797,462.29/1,869.72
6. Step 6: Final answer
   x = 1,496.19