Finding the Fourth Proportional to 1,089.89, 1,634.83 and 268.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.89 : 1,634.83 = 268.17 : x
2. Step 2: Convert to fraction form
   1,089.89/1,634.83 = 268.17/x
3. Step 3: Cross multiply
   1,089.89x = 1,634.83 × 268.17
4. Step 4: Simplify right side
   1,089.89x = 438,411.69
5. Step 5: Solve for x
   x = 438,411.69/1,089.89
6. Step 6: Final answer
   x = 402.25