Finding the Fourth Proportional to 1,561.33, 2,340.03 and 683.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.33 : 2,340.03 = 683.60 : x
2. Step 2: Convert to fraction form
   1,561.33/2,340.03 = 683.60/x
3. Step 3: Cross multiply
   1,561.33x = 2,340.03 × 683.60
4. Step 4: Simplify right side
   1,561.33x = 1,599,644.51
5. Step 5: Solve for x
   x = 1,599,644.51/1,561.33
6. Step 6: Final answer
   x = 1,024.54