Finding the Fourth Proportional to 2,012.10, 2,776.68 and 1,127.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.10 : 2,776.68 = 1,127.91 : x
2. Step 2: Convert to fraction form
   2,012.10/2,776.68 = 1,127.91/x
3. Step 3: Cross multiply
   2,012.10x = 2,776.68 × 1,127.91
4. Step 4: Simplify right side
   2,012.10x = 3,131,845.14
5. Step 5: Solve for x
   x = 3,131,845.14/2,012.10
6. Step 6: Final answer
   x = 1,556.51