Finding the Fourth Proportional to 3,429.02, 5,143.51 and 1,120.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,429.02 : 5,143.51 = 1,120.50 : x
2. Step 2: Convert to fraction form
   3,429.02/5,143.51 = 1,120.50/x
3. Step 3: Cross multiply
   3,429.02x = 5,143.51 × 1,120.50
4. Step 4: Simplify right side
   3,429.02x = 5,763,302.96
5. Step 5: Solve for x
   x = 5,763,302.96/3,429.02
6. Step 6: Final answer
   x = 1,680.74