Finding the Fourth Proportional to 1,087.71, 1,501.83 and 668.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.71 : 1,501.83 = 668.64 : x
2. Step 2: Convert to fraction form
   1,087.71/1,501.83 = 668.64/x
3. Step 3: Cross multiply
   1,087.71x = 1,501.83 × 668.64
4. Step 4: Simplify right side
   1,087.71x = 1,004,183.61
5. Step 5: Solve for x
   x = 1,004,183.61/1,087.71
6. Step 6: Final answer
   x = 923.21