Finding the Fourth Proportional to 1,136.25, 1,567.58 and 716.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136.25 : 1,567.58 = 716.45 : x
2. Step 2: Convert to fraction form
   1,136.25/1,567.58 = 716.45/x
3. Step 3: Cross multiply
   1,136.25x = 1,567.58 × 716.45
4. Step 4: Simplify right side
   1,136.25x = 1,123,081.27
5. Step 5: Solve for x
   x = 1,123,081.27/1,136.25
6. Step 6: Final answer
   x = 988.41