Finding the Fourth Proportional to 2,800.72, 3,862.56 and 1,805.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,800.72 : 3,862.56 = 1,805.68 : x
2. Step 2: Convert to fraction form
   2,800.72/3,862.56 = 1,805.68/x
3. Step 3: Cross multiply
   2,800.72x = 3,862.56 × 1,805.68
4. Step 4: Simplify right side
   2,800.72x = 6,974,547.34
5. Step 5: Solve for x
   x = 6,974,547.34/2,800.72
6. Step 6: Final answer
   x = 2,490.27