Finding the Fourth Proportional to 1,218.56, 1,681.52 and 694.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218.56 : 1,681.52 = 694.52 : x
2. Step 2: Convert to fraction form
   1,218.56/1,681.52 = 694.52/x
3. Step 3: Cross multiply
   1,218.56x = 1,681.52 × 694.52
4. Step 4: Simplify right side
   1,218.56x = 1,167,849.27
5. Step 5: Solve for x
   x = 1,167,849.27/1,218.56
6. Step 6: Final answer
   x = 958.38