Finding the Fourth Proportional to 1,828.69, 2,523.59 and 989.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,828.69 : 2,523.59 = 989.39 : x
2. Step 2: Convert to fraction form
   1,828.69/2,523.59 = 989.39/x
3. Step 3: Cross multiply
   1,828.69x = 2,523.59 × 989.39
4. Step 4: Simplify right side
   1,828.69x = 2,496,809.76
5. Step 5: Solve for x
   x = 2,496,809.76/1,828.69
6. Step 6: Final answer
   x = 1,365.35