Finding the Fourth Proportional to 2,015.51, 2,781.46 and 1,131.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.51 : 2,781.46 = 1,131.34 : x
2. Step 2: Convert to fraction form
   2,015.51/2,781.46 = 1,131.34/x
3. Step 3: Cross multiply
   2,015.51x = 2,781.46 × 1,131.34
4. Step 4: Simplify right side
   2,015.51x = 3,146,776.96
5. Step 5: Solve for x
   x = 3,146,776.96/2,015.51
6. Step 6: Final answer
   x = 1,561.28