Finding the Fourth Proportional to 3,628.52, 5,443.58 and 1,320

Step by Step Solution

1. Step 1: Write the proportion equation
   3,628.52 : 5,443.58 = 1,320 : x
2. Step 2: Convert to fraction form
   3,628.52/5,443.58 = 1,320/x
3. Step 3: Cross multiply
   3,628.52x = 5,443.58 × 1,320
4. Step 4: Simplify right side
   3,628.52x = 7,185,525.60
5. Step 5: Solve for x
   x = 7,185,525.60/3,628.52
6. Step 6: Final answer
   x = 1,980.29