Finding the Fourth Proportional to 2,012.25, 2,777.01 and 1,128.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.25 : 2,777.01 = 1,128.18 : x
2. Step 2: Convert to fraction form
   2,012.25/2,777.01 = 1,128.18/x
3. Step 3: Cross multiply
   2,012.25x = 2,777.01 × 1,128.18
4. Step 4: Simplify right side
   2,012.25x = 3,132,967.14
5. Step 5: Solve for x
   x = 3,132,967.14/2,012.25
6. Step 6: Final answer
   x = 1,556.95