Finding the Fourth Proportional to 1,613.31, 2,226.72 and 984.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,613.31 : 2,226.72 = 984.05 : x
2. Step 2: Convert to fraction form
   1,613.31/2,226.72 = 984.05/x
3. Step 3: Cross multiply
   1,613.31x = 2,226.72 × 984.05
4. Step 4: Simplify right side
   1,613.31x = 2,191,203.82
5. Step 5: Solve for x
   x = 2,191,203.82/1,613.31
6. Step 6: Final answer
   x = 1,358.20