Finding the Fourth Proportional to 2,085.04, 3,108.43 and 1,920.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.04 : 3,108.43 = 1,920.61 : x
2. Step 2: Convert to fraction form
   2,085.04/3,108.43 = 1,920.61/x
3. Step 3: Cross multiply
   2,085.04x = 3,108.43 × 1,920.61
4. Step 4: Simplify right side
   2,085.04x = 5,970,081.74
5. Step 5: Solve for x
   x = 5,970,081.74/2,085.04
6. Step 6: Final answer
   x = 2,863.29