Finding the Fourth Proportional to 2,116.84, 3,171.84 and 1,292.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.84 : 3,171.84 = 1,292.61 : x
2. Step 2: Convert to fraction form
   2,116.84/3,171.84 = 1,292.61/x
3. Step 3: Cross multiply
   2,116.84x = 3,171.84 × 1,292.61
4. Step 4: Simplify right side
   2,116.84x = 4,099,952.10
5. Step 5: Solve for x
   x = 4,099,952.10/2,116.84
6. Step 6: Final answer
   x = 1,936.83