Finding the Fourth Proportional to 2,739.89, 4,108.96 and 890.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,739.89 : 4,108.96 = 890.56 : x
2. Step 2: Convert to fraction form
   2,739.89/4,108.96 = 890.56/x
3. Step 3: Cross multiply
   2,739.89x = 4,108.96 × 890.56
4. Step 4: Simplify right side
   2,739.89x = 3,659,281.67
5. Step 5: Solve for x
   x = 3,659,281.67/2,739.89
6. Step 6: Final answer
   x = 1,335.56