Finding the Fourth Proportional to 1,140.76, 1,573.83 and 668.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,140.76 : 1,573.83 = 668.59 : x
2. Step 2: Convert to fraction form
   1,140.76/1,573.83 = 668.59/x
3. Step 3: Cross multiply
   1,140.76x = 1,573.83 × 668.59
4. Step 4: Simplify right side
   1,140.76x = 1,052,247.00
5. Step 5: Solve for x
   x = 1,052,247.00/1,140.76
6. Step 6: Final answer
   x = 922.41