Finding the Fourth Proportional to 3,172.30, 4,760.43 and 1,120.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,172.30 : 4,760.43 = 1,120.30 : x
2. Step 2: Convert to fraction form
   3,172.30/4,760.43 = 1,120.30/x
3. Step 3: Cross multiply
   3,172.30x = 4,760.43 × 1,120.30
4. Step 4: Simplify right side
   3,172.30x = 5,333,109.73
5. Step 5: Solve for x
   x = 5,333,109.73/3,172.30
6. Step 6: Final answer
   x = 1,681.15