Finding the Fourth Proportional to 2,740.31, 4,108.42 and 890.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.31 : 4,108.42 = 890.32 : x
2. Step 2: Convert to fraction form
   2,740.31/4,108.42 = 890.32/x
3. Step 3: Cross multiply
   2,740.31x = 4,108.42 × 890.32
4. Step 4: Simplify right side
   2,740.31x = 3,657,808.49
5. Step 5: Solve for x
   x = 3,657,808.49/2,740.31
6. Step 6: Final answer
   x = 1,334.82