Finding the Fourth Proportional to 1,138.82, 1,571.27 and 696.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,138.82 : 1,571.27 = 696.69 : x
2. Step 2: Convert to fraction form
   1,138.82/1,571.27 = 696.69/x
3. Step 3: Cross multiply
   1,138.82x = 1,571.27 × 696.69
4. Step 4: Simplify right side
   1,138.82x = 1,094,684.61
5. Step 5: Solve for x
   x = 1,094,684.61/1,138.82
6. Step 6: Final answer
   x = 961.25