Finding the Fourth Proportional to 2,808.96, 3,876.71 and 1,690.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,808.96 : 3,876.71 = 1,690.48 : x
2. Step 2: Convert to fraction form
   2,808.96/3,876.71 = 1,690.48/x
3. Step 3: Cross multiply
   2,808.96x = 3,876.71 × 1,690.48
4. Step 4: Simplify right side
   2,808.96x = 6,553,500.72
5. Step 5: Solve for x
   x = 6,553,500.72/2,808.96
6. Step 6: Final answer
   x = 2,333.07