Finding the Fourth Proportional to 1,084.42, 1,618.78 and 953.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,084.42 : 1,618.78 = 953.05 : x
2. Step 2: Convert to fraction form
   1,084.42/1,618.78 = 953.05/x
3. Step 3: Cross multiply
   1,084.42x = 1,618.78 × 953.05
4. Step 4: Simplify right side
   1,084.42x = 1,542,778.28
5. Step 5: Solve for x
   x = 1,542,778.28/1,084.42
6. Step 6: Final answer
   x = 1,422.68