Finding the Fourth Proportional to 2,340.72, 3,510.96 and 697.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,340.72 : 3,510.96 = 697.28 : x
2. Step 2: Convert to fraction form
   2,340.72/3,510.96 = 697.28/x
3. Step 3: Cross multiply
   2,340.72x = 3,510.96 × 697.28
4. Step 4: Simplify right side
   2,340.72x = 2,448,122.19
5. Step 5: Solve for x
   x = 2,448,122.19/2,340.72
6. Step 6: Final answer
   x = 1,045.88