Finding the Fourth Proportional to 1,199.07, 1,654.74 and 667.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,199.07 : 1,654.74 = 667.98 : x
2. Step 2: Convert to fraction form
   1,199.07/1,654.74 = 667.98/x
3. Step 3: Cross multiply
   1,199.07x = 1,654.74 × 667.98
4. Step 4: Simplify right side
   1,199.07x = 1,105,333.23
5. Step 5: Solve for x
   x = 1,105,333.23/1,199.07
6. Step 6: Final answer
   x = 921.82