Finding the Fourth Proportional to 2,015.99, 2,782.06 and 1,131.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.99 : 2,782.06 = 1,131.77 : x
2. Step 2: Convert to fraction form
   2,015.99/2,782.06 = 1,131.77/x
3. Step 3: Cross multiply
   2,015.99x = 2,782.06 × 1,131.77
4. Step 4: Simplify right side
   2,015.99x = 3,148,638.14
5. Step 5: Solve for x
   x = 3,148,638.14/2,015.99
6. Step 6: Final answer
   x = 1,561.84