Finding the Fourth Proportional to 2,015.76, 2,782.32 and 1,131.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.76 : 2,782.32 = 1,131.86 : x
2. Step 2: Convert to fraction form
   2,015.76/2,782.32 = 1,131.86/x
3. Step 3: Cross multiply
   2,015.76x = 2,782.32 × 1,131.86
4. Step 4: Simplify right side
   2,015.76x = 3,149,196.72
5. Step 5: Solve for x
   x = 3,149,196.72/2,015.76
6. Step 6: Final answer
   x = 1,562.29