Finding the Fourth Proportional to 1,105.87, 1,659.89 and 902.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.87 : 1,659.89 = 902.83 : x
2. Step 2: Convert to fraction form
   1,105.87/1,659.89 = 902.83/x
3. Step 3: Cross multiply
   1,105.87x = 1,659.89 × 902.83
4. Step 4: Simplify right side
   1,105.87x = 1,498,598.49
5. Step 5: Solve for x
   x = 1,498,598.49/1,105.87
6. Step 6: Final answer
   x = 1,355.13