Finding the Fourth Proportional to 1,090.69, 1,626.37 and 961.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.69 : 1,626.37 = 961.18 : x
2. Step 2: Convert to fraction form
   1,090.69/1,626.37 = 961.18/x
3. Step 3: Cross multiply
   1,090.69x = 1,626.37 × 961.18
4. Step 4: Simplify right side
   1,090.69x = 1,563,234.32
5. Step 5: Solve for x
   x = 1,563,234.32/1,090.69
6. Step 6: Final answer
   x = 1,433.25