Finding the Fourth Proportional to 1,136.78, 1,568.72 and 743.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136.78 : 1,568.72 = 743.79 : x
2. Step 2: Convert to fraction form
   1,136.78/1,568.72 = 743.79/x
3. Step 3: Cross multiply
   1,136.78x = 1,568.72 × 743.79
4. Step 4: Simplify right side
   1,136.78x = 1,166,800.11
5. Step 5: Solve for x
   x = 1,166,800.11/1,136.78
6. Step 6: Final answer
   x = 1,026.41