Finding the Fourth Proportional to 1,139.33, 1,572.69 and 697.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.33 : 1,572.69 = 697.25 : x
2. Step 2: Convert to fraction form
   1,139.33/1,572.69 = 697.25/x
3. Step 3: Cross multiply
   1,139.33x = 1,572.69 × 697.25
4. Step 4: Simplify right side
   1,139.33x = 1,096,550.24
5. Step 5: Solve for x
   x = 1,096,550.24/1,139.33
6. Step 6: Final answer
   x = 962.46