Finding the Fourth Proportional to 1,461.81, 2,016.67 and 990.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,461.81 : 2,016.67 = 990.25 : x
2. Step 2: Convert to fraction form
   1,461.81/2,016.67 = 990.25/x
3. Step 3: Cross multiply
   1,461.81x = 2,016.67 × 990.25
4. Step 4: Simplify right side
   1,461.81x = 1,997,007.47
5. Step 5: Solve for x
   x = 1,997,007.47/1,461.81
6. Step 6: Final answer
   x = 1,366.12