Finding the Fourth Proportional to 2,111.66, 3,162.80 and 1,699.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.66 : 3,162.80 = 1,699.76 : x
2. Step 2: Convert to fraction form
   2,111.66/3,162.80 = 1,699.76/x
3. Step 3: Cross multiply
   2,111.66x = 3,162.80 × 1,699.76
4. Step 4: Simplify right side
   2,111.66x = 5,375,976.62
5. Step 5: Solve for x
   x = 5,375,976.62/2,111.66
6. Step 6: Final answer
   x = 2,545.86