Finding the Fourth Proportional to 2,109.62, 3,164.42 and 722.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.62 : 3,164.42 = 722.97 : x
2. Step 2: Convert to fraction form
   2,109.62/3,164.42 = 722.97/x
3. Step 3: Cross multiply
   2,109.62x = 3,164.42 × 722.97
4. Step 4: Simplify right side
   2,109.62x = 2,287,780.73
5. Step 5: Solve for x
   x = 2,287,780.73/2,109.62
6. Step 6: Final answer
   x = 1,084.45