Finding the Fourth Proportional to 1,128.46, 1,556.76 and 866.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.46 : 1,556.76 = 866.02 : x
2. Step 2: Convert to fraction form
   1,128.46/1,556.76 = 866.02/x
3. Step 3: Cross multiply
   1,128.46x = 1,556.76 × 866.02
4. Step 4: Simplify right side
   1,128.46x = 1,348,185.30
5. Step 5: Solve for x
   x = 1,348,185.30/1,128.46
6. Step 6: Final answer
   x = 1,194.71