Finding the Fourth Proportional to 1,191.98, 1,644.91 and 668.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.98 : 1,644.91 = 668.00 : x
2. Step 2: Convert to fraction form
   1,191.98/1,644.91 = 668.00/x
3. Step 3: Cross multiply
   1,191.98x = 1,644.91 × 668.00
4. Step 4: Simplify right side
   1,191.98x = 1,098,802.32
5. Step 5: Solve for x
   x = 1,098,802.32/1,191.98
6. Step 6: Final answer
   x = 921.83