Finding the Fourth Proportional to 1,128.18, 1,555.89 and 834.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.18 : 1,555.89 = 834.18 : x
2. Step 2: Convert to fraction form
   1,128.18/1,555.89 = 834.18/x
3. Step 3: Cross multiply
   1,128.18x = 1,555.89 × 834.18
4. Step 4: Simplify right side
   1,128.18x = 1,297,892.32
5. Step 5: Solve for x
   x = 1,297,892.32/1,128.18
6. Step 6: Final answer
   x = 1,150.43