Finding the Fourth Proportional to 1,456.51, 2,010.72 and 986.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.51 : 2,010.72 = 986.88 : x
2. Step 2: Convert to fraction form
   1,456.51/2,010.72 = 986.88/x
3. Step 3: Cross multiply
   1,456.51x = 2,010.72 × 986.88
4. Step 4: Simplify right side
   1,456.51x = 1,984,350.59
5. Step 5: Solve for x
   x = 1,984,350.59/1,456.51
6. Step 6: Final answer
   x = 1,362.40