Finding the Fourth Proportional to 1,968.16, 2,715.33 and 1,128.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,968.16 : 2,715.33 = 1,128.26 : x
2. Step 2: Convert to fraction form
   1,968.16/2,715.33 = 1,128.26/x
3. Step 3: Cross multiply
   1,968.16x = 2,715.33 × 1,128.26
4. Step 4: Simplify right side
   1,968.16x = 3,063,598.23
5. Step 5: Solve for x
   x = 3,063,598.23/1,968.16
6. Step 6: Final answer
   x = 1,556.58