Finding the Fourth Proportional to 1,137.81, 1,570.46 and 696.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,137.81 : 1,570.46 = 696.09 : x
2. Step 2: Convert to fraction form
   1,137.81/1,570.46 = 696.09/x
3. Step 3: Cross multiply
   1,137.81x = 1,570.46 × 696.09
4. Step 4: Simplify right side
   1,137.81x = 1,093,181.50
5. Step 5: Solve for x
   x = 1,093,181.50/1,137.81
6. Step 6: Final answer
   x = 960.78