Finding the Fourth Proportional to 2,015.35, 2,781.35 and 1,131.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.35 : 2,781.35 = 1,131.24 : x
2. Step 2: Convert to fraction form
   2,015.35/2,781.35 = 1,131.24/x
3. Step 3: Cross multiply
   2,015.35x = 2,781.35 × 1,131.24
4. Step 4: Simplify right side
   2,015.35x = 3,146,374.37
5. Step 5: Solve for x
   x = 3,146,374.37/2,015.35
6. Step 6: Final answer
   x = 1,561.20