Finding the Fourth Proportional to 2,536.76, 3,804.76 and 687.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,536.76 : 3,804.76 = 687.98 : x
2. Step 2: Convert to fraction form
   2,536.76/3,804.76 = 687.98/x
3. Step 3: Cross multiply
   2,536.76x = 3,804.76 × 687.98
4. Step 4: Simplify right side
   2,536.76x = 2,617,598.78
5. Step 5: Solve for x
   x = 2,617,598.78/2,536.76
6. Step 6: Final answer
   x = 1,031.87