Finding the Fourth Proportional to 1,456.30, 2,010.12 and 990.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.30 : 2,010.12 = 990.82 : x
2. Step 2: Convert to fraction form
   1,456.30/2,010.12 = 990.82/x
3. Step 3: Cross multiply
   1,456.30x = 2,010.12 × 990.82
4. Step 4: Simplify right side
   1,456.30x = 1,991,667.10
5. Step 5: Solve for x
   x = 1,991,667.10/1,456.30
6. Step 6: Final answer
   x = 1,367.62