Finding the Fourth Proportional to 1,213.72, 1,674.89 and 682.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,213.72 : 1,674.89 = 682.58 : x
2. Step 2: Convert to fraction form
   1,213.72/1,674.89 = 682.58/x
3. Step 3: Cross multiply
   1,213.72x = 1,674.89 × 682.58
4. Step 4: Simplify right side
   1,213.72x = 1,143,243.00
5. Step 5: Solve for x
   x = 1,143,243.00/1,213.72
6. Step 6: Final answer
   x = 941.94