Finding the Fourth Proportional to 1,105.70, 1,656.15 and 984.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.70 : 1,656.15 = 984.10 : x
2. Step 2: Convert to fraction form
   1,105.70/1,656.15 = 984.10/x
3. Step 3: Cross multiply
   1,105.70x = 1,656.15 × 984.10
4. Step 4: Simplify right side
   1,105.70x = 1,629,817.22
5. Step 5: Solve for x
   x = 1,629,817.22/1,105.70
6. Step 6: Final answer
   x = 1,474.01