Finding the Fourth Proportional to 2,099.76, 3,143.16 and 1,788.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.76 : 3,143.16 = 1,788.72 : x
2. Step 2: Convert to fraction form
   2,099.76/3,143.16 = 1,788.72/x
3. Step 3: Cross multiply
   2,099.76x = 3,143.16 × 1,788.72
4. Step 4: Simplify right side
   2,099.76x = 5,622,233.16
5. Step 5: Solve for x
   x = 5,622,233.16/2,099.76
6. Step 6: Final answer
   x = 2,677.56