Finding the Fourth Proportional to 2,161.82, 2,983.51 and 1,690.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,161.82 : 2,983.51 = 1,690.14 : x
2. Step 2: Convert to fraction form
   2,161.82/2,983.51 = 1,690.14/x
3. Step 3: Cross multiply
   2,161.82x = 2,983.51 × 1,690.14
4. Step 4: Simplify right side
   2,161.82x = 5,042,549.59
5. Step 5: Solve for x
   x = 5,042,549.59/2,161.82
6. Step 6: Final answer
   x = 2,332.55