Finding the Fourth Proportional to 1,136.72, 1,568.24 and 694.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136.72 : 1,568.24 = 694.40 : x
2. Step 2: Convert to fraction form
   1,136.72/1,568.24 = 694.40/x
3. Step 3: Cross multiply
   1,136.72x = 1,568.24 × 694.40
4. Step 4: Simplify right side
   1,136.72x = 1,088,985.86
5. Step 5: Solve for x
   x = 1,088,985.86/1,136.72
6. Step 6: Final answer
   x = 958.01