Finding the Fourth Proportional to 1,787.46, 2,466.71 and 990.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,787.46 : 2,466.71 = 990.81 : x
2. Step 2: Convert to fraction form
   1,787.46/2,466.71 = 990.81/x
3. Step 3: Cross multiply
   1,787.46x = 2,466.71 × 990.81
4. Step 4: Simplify right side
   1,787.46x = 2,444,040.94
5. Step 5: Solve for x
   x = 2,444,040.94/1,787.46
6. Step 6: Final answer
   x = 1,367.33