Finding the Fourth Proportional to 1,355.80, 1,871.28 and 984.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.80 : 1,871.28 = 984.52 : x
2. Step 2: Convert to fraction form
   1,355.80/1,871.28 = 984.52/x
3. Step 3: Cross multiply
   1,355.80x = 1,871.28 × 984.52
4. Step 4: Simplify right side
   1,355.80x = 1,842,312.59
5. Step 5: Solve for x
   x = 1,842,312.59/1,355.80
6. Step 6: Final answer
   x = 1,358.84