Finding the Fourth Proportional to 2,012.57, 2,777.17 and 1,116.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.57 : 2,777.17 = 1,116.31 : x
2. Step 2: Convert to fraction form
   2,012.57/2,777.17 = 1,116.31/x
3. Step 3: Cross multiply
   2,012.57x = 2,777.17 × 1,116.31
4. Step 4: Simplify right side
   2,012.57x = 3,100,172.91
5. Step 5: Solve for x
   x = 3,100,172.91/2,012.57
6. Step 6: Final answer
   x = 1,540.40