Finding the Fourth Proportional to 1,458.72, 2,013.28 and 986.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,458.72 : 2,013.28 = 986.56 : x
2. Step 2: Convert to fraction form
   1,458.72/2,013.28 = 986.56/x
3. Step 3: Cross multiply
   1,458.72x = 2,013.28 × 986.56
4. Step 4: Simplify right side
   1,458.72x = 1,986,221.52
5. Step 5: Solve for x
   x = 1,986,221.52/1,458.72
6. Step 6: Final answer
   x = 1,361.62