Finding the Fourth Proportional to 1,525.87, 2,105.61 and 986.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.87 : 2,105.61 = 986.56 : x
2. Step 2: Convert to fraction form
   1,525.87/2,105.61 = 986.56/x
3. Step 3: Cross multiply
   1,525.87x = 2,105.61 × 986.56
4. Step 4: Simplify right side
   1,525.87x = 2,077,305.34
5. Step 5: Solve for x
   x = 2,077,305.34/1,525.87
6. Step 6: Final answer
   x = 1,361.39