Finding the Fourth Proportional to 1,127.52, 1,556.42 and 866.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.52 : 1,556.42 = 866.30 : x
2. Step 2: Convert to fraction form
   1,127.52/1,556.42 = 866.30/x
3. Step 3: Cross multiply
   1,127.52x = 1,556.42 × 866.30
4. Step 4: Simplify right side
   1,127.52x = 1,348,314.53
5. Step 5: Solve for x
   x = 1,348,314.53/1,127.52
6. Step 6: Final answer
   x = 1,195.82