Finding the Fourth Proportional to 1,040.55, 1,436.17 and 668.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.55 : 1,436.17 = 668.00 : x
2. Step 2: Convert to fraction form
   1,040.55/1,436.17 = 668.00/x
3. Step 3: Cross multiply
   1,040.55x = 1,436.17 × 668.00
4. Step 4: Simplify right side
   1,040.55x = 959,364.02
5. Step 5: Solve for x
   x = 959,364.02/1,040.55
6. Step 6: Final answer
   x = 921.97