Finding the Fourth Proportional to 1,867.29, 2,797.89 and 989.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,867.29 : 2,797.89 = 989.73 : x
2. Step 2: Convert to fraction form
   1,867.29/2,797.89 = 989.73/x
3. Step 3: Cross multiply
   1,867.29x = 2,797.89 × 989.73
4. Step 4: Simplify right side
   1,867.29x = 2,769,155.67
5. Step 5: Solve for x
   x = 2,769,155.67/1,867.29
6. Step 6: Final answer
   x = 1,482.98