Finding the Fourth Proportional to 2,213.69, 3,320.48 and 897.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.69 : 3,320.48 = 897.08 : x
2. Step 2: Convert to fraction form
   2,213.69/3,320.48 = 897.08/x
3. Step 3: Cross multiply
   2,213.69x = 3,320.48 × 897.08
4. Step 4: Simplify right side
   2,213.69x = 2,978,721.84
5. Step 5: Solve for x
   x = 2,978,721.84/2,213.69
6. Step 6: Final answer
   x = 1,345.59