Finding the Fourth Proportional to 1,155.02, 1,723.39 and 1,085

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.02 : 1,723.39 = 1,085 : x
2. Step 2: Convert to fraction form
   1,155.02/1,723.39 = 1,085/x
3. Step 3: Cross multiply
   1,155.02x = 1,723.39 × 1,085
4. Step 4: Simplify right side
   1,155.02x = 1,869,878.15
5. Step 5: Solve for x
   x = 1,869,878.15/1,155.02
6. Step 6: Final answer
   x = 1,618.91