Finding the Fourth Proportional to 1,786.82, 2,465.73 and 990.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,786.82 : 2,465.73 = 990.09 : x
2. Step 2: Convert to fraction form
   1,786.82/2,465.73 = 990.09/x
3. Step 3: Cross multiply
   1,786.82x = 2,465.73 × 990.09
4. Step 4: Simplify right side
   1,786.82x = 2,441,294.62
5. Step 5: Solve for x
   x = 2,441,294.62/1,786.82
6. Step 6: Final answer
   x = 1,366.28