Finding the Fourth Proportional to 1,091.25, 1,503.81 and 697.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.25 : 1,503.81 = 697.59 : x
2. Step 2: Convert to fraction form
   1,091.25/1,503.81 = 697.59/x
3. Step 3: Cross multiply
   1,091.25x = 1,503.81 × 697.59
4. Step 4: Simplify right side
   1,091.25x = 1,049,042.82
5. Step 5: Solve for x
   x = 1,049,042.82/1,091.25
6. Step 6: Final answer
   x = 961.32