Finding the Fourth Proportional to 2,161.43, 2,981.59 and 1,881.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,161.43 : 2,981.59 = 1,881.17 : x
2. Step 2: Convert to fraction form
   2,161.43/2,981.59 = 1,881.17/x
3. Step 3: Cross multiply
   2,161.43x = 2,981.59 × 1,881.17
4. Step 4: Simplify right side
   2,161.43x = 5,608,879.81
5. Step 5: Solve for x
   x = 5,608,879.81/2,161.43
6. Step 6: Final answer
   x = 2,594.99