Finding the Fourth Proportional to 2,061.38, 3,091.13 and 890.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.38 : 3,091.13 = 890.83 : x
2. Step 2: Convert to fraction form
   2,061.38/3,091.13 = 890.83/x
3. Step 3: Cross multiply
   2,061.38x = 3,091.13 × 890.83
4. Step 4: Simplify right side
   2,061.38x = 2,753,671.34
5. Step 5: Solve for x
   x = 2,753,671.34/2,061.38
6. Step 6: Final answer
   x = 1,335.84