Finding the Fourth Proportional to 2,084.86, 3,105.52 and 1,990.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,084.86 : 3,105.52 = 1,990.09 : x
2. Step 2: Convert to fraction form
   2,084.86/3,105.52 = 1,990.09/x
3. Step 3: Cross multiply
   2,084.86x = 3,105.52 × 1,990.09
4. Step 4: Simplify right side
   2,084.86x = 6,180,264.30
5. Step 5: Solve for x
   x = 6,180,264.30/2,084.86
6. Step 6: Final answer
   x = 2,964.35