Finding the Fourth Proportional to 2,012.31, 2,776.80 and 1,127.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.31 : 2,776.80 = 1,127.92 : x
2. Step 2: Convert to fraction form
   2,012.31/2,776.80 = 1,127.92/x
3. Step 3: Cross multiply
   2,012.31x = 2,776.80 × 1,127.92
4. Step 4: Simplify right side
   2,012.31x = 3,132,008.26
5. Step 5: Solve for x
   x = 3,132,008.26/2,012.31
6. Step 6: Final answer
   x = 1,556.42