Finding the Fourth Proportional to 2,289.98, 3,436.41 and 1,120.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.98 : 3,436.41 = 1,120.70 : x
2. Step 2: Convert to fraction form
   2,289.98/3,436.41 = 1,120.70/x
3. Step 3: Cross multiply
   2,289.98x = 3,436.41 × 1,120.70
4. Step 4: Simplify right side
   2,289.98x = 3,851,184.69
5. Step 5: Solve for x
   x = 3,851,184.69/2,289.98
6. Step 6: Final answer
   x = 1,681.75