Finding the Fourth Proportional to 1,088.56, 1,632.83 and 266.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.56 : 1,632.83 = 266.83 : x
2. Step 2: Convert to fraction form
   1,088.56/1,632.83 = 266.83/x
3. Step 3: Cross multiply
   1,088.56x = 1,632.83 × 266.83
4. Step 4: Simplify right side
   1,088.56x = 435,688.03
5. Step 5: Solve for x
   x = 435,688.03/1,088.56
6. Step 6: Final answer
   x = 400.24