Finding the Fourth Proportional to 2,290.76, 3,433.90 and 1,120.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.76 : 3,433.90 = 1,120.72 : x
2. Step 2: Convert to fraction form
   2,290.76/3,433.90 = 1,120.72/x
3. Step 3: Cross multiply
   2,290.76x = 3,433.90 × 1,120.72
4. Step 4: Simplify right side
   2,290.76x = 3,848,440.41
5. Step 5: Solve for x
   x = 3,848,440.41/2,290.76
6. Step 6: Final answer
   x = 1,679.98